CA1237201A - Database backup method - Google Patents
Database backup methodInfo
- Publication number
- CA1237201A CA1237201A CA000487514A CA487514A CA1237201A CA 1237201 A CA1237201 A CA 1237201A CA 000487514 A CA000487514 A CA 000487514A CA 487514 A CA487514 A CA 487514A CA 1237201 A CA1237201 A CA 1237201A
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- CA
- Canada
- Prior art keywords
- peripheral
- memory
- bit
- modifications
- central computer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
- G06F11/1451—Management of the data involved in backup or backup restore by selection of backup contents
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99951—File or database maintenance
- Y10S707/99952—Coherency, e.g. same view to multiple users
- Y10S707/99953—Recoverability
Abstract
DATABASE BACKUP METHOD
Abstract A method of generating a backup copy of a database system. Modifications made to the database since the generation of a prior backup copy are summarized in a bit map on a page basis. When the next backup copy is made, only modified pages are transmitted and merged with the prior copy. Plural backup passes are made. New modifications are allowed to occur to the database on all but the last pass. Any database modification made at an address that has already been examined during a pass is backed-up during the next pass. Modifications are locked out at the beginning of the last pass to allow the final generation of a consistent and complete backup copy.
Abstract A method of generating a backup copy of a database system. Modifications made to the database since the generation of a prior backup copy are summarized in a bit map on a page basis. When the next backup copy is made, only modified pages are transmitted and merged with the prior copy. Plural backup passes are made. New modifications are allowed to occur to the database on all but the last pass. Any database modification made at an address that has already been examined during a pass is backed-up during the next pass. Modifications are locked out at the beginning of the last pass to allow the final generation of a consistent and complete backup copy.
Description
DATA~ASE ~ACKUP METHO~
Techn eld The invention relates to database systems in general and, in particular, to methods of producing backup dumps of the contents of database systems.
Background of the Invention There is a need in virtually all database systems to periodically prod~ce a backup copy, or dump, of the contents of the stored information in the system. This is because the stored information in databases typically changes over time. A backup copy of the contents of a database at some point in time assures that the database can be restored to the state existing at that point in time in case oE a malfunction that corrupts the database.
The classic method of producing a database backup is to establish a system state in which modifications to the database are disallowed and then to copy the entire database information directly onto a mass memory, such as a backup disc or tape. Unfortunately, in many types of databases this method incurs a larye expense in terms of system unavailability to users. For example, according to an article by Kaunitz and Ekert appearing in the Australian Computer Journal, Vol. 13, No. 4, November 1981, entitled "Database Backup-The Problem of Very Large Databases," the time and resources required to backup databases larger than one billion by~es are viewed as critical problems by the database users.
A similar problem can occur in a small distributed database system if a backup of the distributed database is to be produced on a single resource, such as a disk. If the communication channels between the distributed database are slow or are congested, the real time reguired to take a full backup of each database site may approach that of a large centralized database. Thus, the disadvanta~es inherent in the classic method of dumping may be present.
The above article by Kaunitz and Ekert surveys several techniques which have been proposed to alleviate problems of database backup. According to the article, some systems provide an elaborate dynamic backup mechanism whereby database backups are made entirely in the presence of normal user processing, including ongoing modiication of the database information. In these techniques, since a backup completed at any given time usually does not represent a consistent state of the database, other means must be used to place the database reloaded from a backup file in a logically consistent state~ A typical method of doing this is to maintain an audit trail of modifications to a database as the modifications occur. Having reloaded the database from a backup file, the audit trail must be reprocessed from the earliest point in time reflected by the backup file to the time that the database was corrupted. Then the effect of modifications that were in progress at the time of failure must be removed by some process. Obviously, this is an expensive and complicated process.
Kaunitz and ~kert also mention a differential backup technique as an alternative to the classic backup technique. The database is viewed as consisting of a number of pages of fixed size. A full backup is initially taken of the database. Thereafter, as modifications are made to the database, bit indications are entered into a bit map according to the pages that are affected.
Eventually a backup differential file is created by saving only those pages that have been modified as indicated by the bit map. Periodically, this differential backup file is updated with the pages that changed since the last differential backup. At some point, the differential backup file is either merged with the full backup file or a new full backup is taken.
The differential method above also has certain problems. First, a separate differential backup file must be maintained in addition to a full backup file. In the event that the database must be rebuilt/ the full backup must be reloaded and then merged with the differential file. Secondly, the system is unavailable for updates during a backup process.
Summary of the Invention In accordance with an aspect of the invention there is provided in a distributed data base system having a central computer, a central computer main memory, a central computer mass memory, and a plurality of peripheral data base memories, a method of generating a backup copy of the contents of each of the peripheral data base memories in the central computer mass memory, comprising the steps of setting indications of modifications to the stored contents of a peripheral memory as modifications are made, executing a plurality of update passes on each of the peripheral memories, wherein each pass except the last pass includes allowing update modifications to occur to the peripheral memory being backed-up at a given time during execution of the pass, sequentially examining the modification indications and transmitting indicated modifi~ations of the peripheral memory being backed-up at a given time from the peripheral memory to the mass memory, removing indications of modifications as the modifications are transmitted to the mass memory, executing a last update pass on each o the peripheral memories, wherein the last pass includes inhibiting update modifications to the peripheral memory being updated a~ a given time, and transmitting all modifications to the peripheral memory being backed-up indicated to be present at the beginning of the last pass to the mass memory.
The above problems are solved and an advance is made in the art in a method of generating a backup copy of a database system. Modifications made to the database since the generation of a prior backup copy are summarized in a bit map on a page basis. When the next backup copy is made, only modified pages are transmitted and merged - 3a -with the prior copy. Plural backup passes are made. New modifications are al~owed to occur to the database on all but the last pass. Any database modification made at an address that has already been examined during a pass is backed-up during the next pass. Modifications are locked out at the beginning of the last pass to allow the ~inal generation of a consistent and complete backup copy. The method provides a simple and efficient means of generating backups while reducing the amount o~ time that a database is unavailable to its users for modifications. Most of the database modifications are backed-up during the initial pass or passes while modifications are still allowed. Any residual modifications occurring during the initial pass or passes are backed-up during the final pass when additional modifications are disallowed.
The preferred and disclosed embodiment of the invention is in a distributed database system involving slow communication channels between each of the individual databases and a central processor. This system may be viewed as equivalent, in terms of the time required to generate a backup, to a large database in which the backup time may be a problem. Two passes are made in the preferred embodiment. The individual databases are sequentially backed-up during each pass. The individual database being backed-up at any given time is locked to modifications during the last pass. This assures that virtually the distributed database as a whole is available to users during almost the entire time required to generate the backup.
Brief Description of the Drawing In the drawina, Fig. 1 is a block diagram o a distributed computer-control]ed telephone system, including a central processor and one or more switching modules, used to practice the invention;
Fig. 2 recited with Fig. 6 illustrates how a database memory associated with a switching module is divided into pages and how a bit map is used to record pages of the memory that have been modified since the last generation of a backup copy of the memory;
Fig. 3 shows an illustrative flowchart of the main backup program used to control the central processor during backup generation, Fig. 4 shows illustrative flowchart details of a backup subroutine called by the main program of Fig. 3;
Fig. 5 shows illustrative flowchart details of a backup program located in memory at each of the switch modules; and Fig. 6 shows an illustrative format of a differential backup message sent by a switch module to the central processor during a backup process. 5 Detailed Descri tion _., P
Fig. 1 shows a simplified block diagram of a distributed number 5 electronic switching telephone system.
This system is used to illustrate the principles of the invention. Fundamentally, the system comprises a central processor 100 and one or more switching modules 102-1 to 102-N. In the illustrative system, central processor 100 is a commercially available processor. It handles the functions that require centralized intelligence, including allocation of resources, overall maintenance, and interface with operations support systems for record keeping, troubleshooting, and so forth.
The central processor 100 is connected to the switch modules, a message switch 104 and a time-multiplexed switch 106. ~essage switch 104 directs the routing of control messages between central processor 100 and the switch rnodules and between the switch modules themselves.
These .~essages travel through the time-multiplex switch 106.
The switch models 102 are microprocessor controlled units that provide most call processing functions. They provide the interfaces between the system and stations and trunks, 108 and 110. Each switch module contains a time slot interchange unit that performs the first stage of switching. Connections involving more than a single switch module are provided by the time-multiplex switch 106.
Central processor 100 is associated with a random access memory 112, part of which is a CP database 114.
This database contains such items as office dependent data and customer data that requires centralized access for functions performed by CP 100. Each of the switch modules 102-l through 102-N is also associated with a separate random access memory 116-1 through 116-N, part of which is a switch module database (SMDB) 118-1 through 118-N. The SMDBs typically contain office dependent data individual to the SM, such as station and trunk appearances, and feature data specific to the stations served by the SM. The CP
database 114 and the SM databases 118 make up a distributed database of the system. CP 100 is also associated with a disk memory 103 which, among other things, is used to store a most recent backup copy of the distributed database.
Another part of each SM memory 116 is a bit map 120. A SM database 118 is conceptually divided into pages of an arbitrary and fixed size. In the illustrative embodiment, a page is 128 bytes in length. When a modification is made to a SMDB 118, such as activation of a customer calling feature~ a "l" is entered into the appropriate bit map at a bit location defining the page ~J ~ ~L
containing the modification. This is illustrated in Fig. 2 in which a bit map having words 0 to P is shown, each assumed to have 10 bits each. To the right of the bit map is a page layout of a SMDB. As shown, the -first bit of the bit m~p is associated with page 0 of the database. The right-most bit of word 0 is associated with page 9 and is set to "l", indicating that page 9 has been modified since a last backup copy was taken.
The program control functions described below have been simplified in the interest of brevity and understanding. For example, the flowcharts of ~igs. 3 through 5 are drawn without concern for such things as real time breaks in program flow, which are commonp]ace in the industry and within the skill of the ordinary art worker.
Database backup may be scheduled to execute periodically, say once a day, or to be executed on demand from, say, a system operator. In either event, entry is made to CP 100 program address START in Fig. 3 to begin the backup. START is a backup control program. Fundamentally J
it controls the successive execution of a backup subroutine shown in Fig. 4 for each SM 102 in an officeO ~ach time the backup subroutine is completed on all the SMs of an office, a pass is said to be completed. At least two and as many passes as desired may be performed. In accordance with the invention, modifications are allowed to occur in the SM databases 118 while backup is being performed during all passes except the last pass. The result is that during the initial passes in which the greater number of modifications are expected to be transmitted to CP 100, and thence to disk 103, the SMDBs 118 are still available for modification. During the final pass, SM database modification lockout occurs for only the very short period of time required to transmit the few, if any, modifications that have occurred to a SM database since the immediately preceding pass. Since modified pages are transmitted from each SMDB in sequential order, modifications that occur to a SM database, such as 118-1, at a page location that has already been examined during a pass on the database are backed~up during the ne~t pass on the database.
Three backup passes 1 through 3 are shown in Fig. 3 for illustration, although it has been Eound that in the exemplary system two passes reduce the modification lockout time to a satisfactory value. In FigO 3, step 300 sets a pass indicator to pass l. Steps 302 and 304 call the backup subroutine ~ACKUP sequentially for each SM of an office until the pass is executed on all SMs. At this point, steps 306, 308 and 310 execute pass 2 on all the SMs to backup intervening modifications to the SM databases that arrived too late to be included during pass l. In accordance with the invention, it is normally expected that the number of modifications backed-up by step 310 is much less than those backed-up by step 304.
After step 310 is executed on all SMs, step 312 sets the pass indicator to pass 3. Step 313 sets an indicator in the CP memory 112 to lockout modifications to the CP database 114. This is done because some CP database modifications cause related modifications to occur in the SM databases. Because modifications are not allowed to an SM that is undergoing a pass 3 backup, modifications must also be disallowed to the CP database.
Steps 314 and 316 now execute the backup subroutine sequentially on each of the SMs 102. When the last SM is completed, step 318 backs up the CP database 114 by copying the entire CP database to disk 103. Since there is no slow communication channel between the CP database and CP 100 and because there is only one CP database, there is no need to backup the CP database in passes. The speed of generating the CP database backup in disk 103 is sufficient to not lock out modifications for an unduly long period of time in this embodiment. Howe~er, it is noted that the CP backup could be generated in passes to avoid such a problem if circumstances were to so warrant.
After backup of the CP database is complete, step 320 unlocks the database by resetting the CP lock indication in memory 112. At this point backup is complete. A copy of the CP database as it e~ists at this point in tim~ and a copy of each of the SM databases as they existed at the time of completion of pass 3 on each individual database exists in disk 103.
Fig. 4 shows the details of the BACKUP subroutine that controls the operations of CP 100. Step 400 determines if pass 3 is in progress. If not, update lockup is not in effect and step 402 causes CP 100 to send a backup alert message to the SM on which this pass is being executed. This alert message includes an "unlocked" flag for passes 1 and 2. On the other hand, if pass 3 is in effect, step 404 sends the alert message to the SM, including a "lock" flag. Fig. 5 shows the details of the program that controls the microprocessors in SMs 102 in response to control messages from CP 100. Step 504 in the SM 102 being addressed recognizes the alert message from CP
100. Step 506 determines if the alert message includes a request to lockout database modifications. If so, step 508 places the lockout state into effect. In either event, step 510 next returns an acknowledge (ACK) message to CP
100 that all is ready to begin the pass.
Step 406 in the CP 100 program recognizes receipt of the ACK message resulting in step 408 transmitting a backup initiation message to the SM. Referring again to Fig. 5, step 502 recognizes the initiation message. In response, step 512 performs certain minor initialization functions such as setting a bit map search pointer to start at the beginning of the bit map. Step 514 begins a search of the bit map shown in Fig. 2 to locate the next "l"
therein indicating a page rnodification. If no "l" is found, steps 516 and 530 result in the generation and transmission of a message to CP 100 with the "finished"
flag set. Step 534 looks for a responsive ACK message from CP 100 and terminates SM START program operation when it is received. On the other hand, assuming that a first "ll' is found, step 520 translates the position of the "l" in the bit map into a page address in the appropriate SM database 118. Step 522 clears the "l" in the bit map. Step 52~
transmits the page associated with the first "1" to CP 100 with the finished flag set to "0" (not finished). Step 532 5 waits for an acknowledge (ACK) message from CP 100 and continues at step 514 when the ACK message is received to locate the ne~t "l" in the bit map. This process continues until all modified pages as indicated in the bit map are transmitted to CP 100.
The above description of the SM backup program is somewhat simplified from what has been found to be preferred. In the specific system described in Fig. 1, it is efficient to transmit up to five modified pages at a time to CP 100 without waiting for an ackncwledge (ACK) message from the CP, rather than one page at a time as illustrated in Fig. 5. This, however, is expected to vary with particular system environments and an appropriate revision of Fig. 5 along these lines is well within the state of art of skilled art workers.
With reference again to the CP 100 program shown in Fig. 4, step 410 receives each transmission of a modified page from an SM then active in a pass. Step 411 returns an acknowledgement (ACK) message to the SM in response to the ACK message. Step 412 tests the "finished"
flag in the message to determine if backup is complete on this pass for this SM. If the flag is not set, the message contains a page of data. Step 414 merges the page into the previous backup copy which exists on disk 103. The process then continues on this SM at step 410. Otherwise, step 424 transmits a database update unlock message to the SM just completed. This message is decoded at step 500 of the SM
program in Fig. 5, causing step 501 to unlock modifications to the SM database. This step actually is effective only for the last pass (pass 3), since updates are already unlocked for the earlier passes.
Referring again to ~ig. 4, at step 426 the CP 100 backup subroutine returns to the appropriate point at step 304, 310 or 316 in the main program after transmitting the unlock message.
In view of the above teaching it is seen that the ~SM databases 11~ are available for updates by users virtually the entire time of backup. Even during the last pass (pass 3), only the SM database actively being backed at any time is locked to updates. Moreover, the differential backup, i.e., the transmission only of modified pages and the merging of the differential updates into the permanent backup disk copy greatly decreases the amount of data re~uired to be processed over the classic full copy method.
It is to be understood that the above-described arrangement is merely illustrative of the application of the principles of the invention and that other arrange~ents may be devised by those skilled in the art without departing from the spirit and scope of the invention.
Techn eld The invention relates to database systems in general and, in particular, to methods of producing backup dumps of the contents of database systems.
Background of the Invention There is a need in virtually all database systems to periodically prod~ce a backup copy, or dump, of the contents of the stored information in the system. This is because the stored information in databases typically changes over time. A backup copy of the contents of a database at some point in time assures that the database can be restored to the state existing at that point in time in case oE a malfunction that corrupts the database.
The classic method of producing a database backup is to establish a system state in which modifications to the database are disallowed and then to copy the entire database information directly onto a mass memory, such as a backup disc or tape. Unfortunately, in many types of databases this method incurs a larye expense in terms of system unavailability to users. For example, according to an article by Kaunitz and Ekert appearing in the Australian Computer Journal, Vol. 13, No. 4, November 1981, entitled "Database Backup-The Problem of Very Large Databases," the time and resources required to backup databases larger than one billion by~es are viewed as critical problems by the database users.
A similar problem can occur in a small distributed database system if a backup of the distributed database is to be produced on a single resource, such as a disk. If the communication channels between the distributed database are slow or are congested, the real time reguired to take a full backup of each database site may approach that of a large centralized database. Thus, the disadvanta~es inherent in the classic method of dumping may be present.
The above article by Kaunitz and Ekert surveys several techniques which have been proposed to alleviate problems of database backup. According to the article, some systems provide an elaborate dynamic backup mechanism whereby database backups are made entirely in the presence of normal user processing, including ongoing modiication of the database information. In these techniques, since a backup completed at any given time usually does not represent a consistent state of the database, other means must be used to place the database reloaded from a backup file in a logically consistent state~ A typical method of doing this is to maintain an audit trail of modifications to a database as the modifications occur. Having reloaded the database from a backup file, the audit trail must be reprocessed from the earliest point in time reflected by the backup file to the time that the database was corrupted. Then the effect of modifications that were in progress at the time of failure must be removed by some process. Obviously, this is an expensive and complicated process.
Kaunitz and ~kert also mention a differential backup technique as an alternative to the classic backup technique. The database is viewed as consisting of a number of pages of fixed size. A full backup is initially taken of the database. Thereafter, as modifications are made to the database, bit indications are entered into a bit map according to the pages that are affected.
Eventually a backup differential file is created by saving only those pages that have been modified as indicated by the bit map. Periodically, this differential backup file is updated with the pages that changed since the last differential backup. At some point, the differential backup file is either merged with the full backup file or a new full backup is taken.
The differential method above also has certain problems. First, a separate differential backup file must be maintained in addition to a full backup file. In the event that the database must be rebuilt/ the full backup must be reloaded and then merged with the differential file. Secondly, the system is unavailable for updates during a backup process.
Summary of the Invention In accordance with an aspect of the invention there is provided in a distributed data base system having a central computer, a central computer main memory, a central computer mass memory, and a plurality of peripheral data base memories, a method of generating a backup copy of the contents of each of the peripheral data base memories in the central computer mass memory, comprising the steps of setting indications of modifications to the stored contents of a peripheral memory as modifications are made, executing a plurality of update passes on each of the peripheral memories, wherein each pass except the last pass includes allowing update modifications to occur to the peripheral memory being backed-up at a given time during execution of the pass, sequentially examining the modification indications and transmitting indicated modifi~ations of the peripheral memory being backed-up at a given time from the peripheral memory to the mass memory, removing indications of modifications as the modifications are transmitted to the mass memory, executing a last update pass on each o the peripheral memories, wherein the last pass includes inhibiting update modifications to the peripheral memory being updated a~ a given time, and transmitting all modifications to the peripheral memory being backed-up indicated to be present at the beginning of the last pass to the mass memory.
The above problems are solved and an advance is made in the art in a method of generating a backup copy of a database system. Modifications made to the database since the generation of a prior backup copy are summarized in a bit map on a page basis. When the next backup copy is made, only modified pages are transmitted and merged - 3a -with the prior copy. Plural backup passes are made. New modifications are al~owed to occur to the database on all but the last pass. Any database modification made at an address that has already been examined during a pass is backed-up during the next pass. Modifications are locked out at the beginning of the last pass to allow the ~inal generation of a consistent and complete backup copy. The method provides a simple and efficient means of generating backups while reducing the amount o~ time that a database is unavailable to its users for modifications. Most of the database modifications are backed-up during the initial pass or passes while modifications are still allowed. Any residual modifications occurring during the initial pass or passes are backed-up during the final pass when additional modifications are disallowed.
The preferred and disclosed embodiment of the invention is in a distributed database system involving slow communication channels between each of the individual databases and a central processor. This system may be viewed as equivalent, in terms of the time required to generate a backup, to a large database in which the backup time may be a problem. Two passes are made in the preferred embodiment. The individual databases are sequentially backed-up during each pass. The individual database being backed-up at any given time is locked to modifications during the last pass. This assures that virtually the distributed database as a whole is available to users during almost the entire time required to generate the backup.
Brief Description of the Drawing In the drawina, Fig. 1 is a block diagram o a distributed computer-control]ed telephone system, including a central processor and one or more switching modules, used to practice the invention;
Fig. 2 recited with Fig. 6 illustrates how a database memory associated with a switching module is divided into pages and how a bit map is used to record pages of the memory that have been modified since the last generation of a backup copy of the memory;
Fig. 3 shows an illustrative flowchart of the main backup program used to control the central processor during backup generation, Fig. 4 shows illustrative flowchart details of a backup subroutine called by the main program of Fig. 3;
Fig. 5 shows illustrative flowchart details of a backup program located in memory at each of the switch modules; and Fig. 6 shows an illustrative format of a differential backup message sent by a switch module to the central processor during a backup process. 5 Detailed Descri tion _., P
Fig. 1 shows a simplified block diagram of a distributed number 5 electronic switching telephone system.
This system is used to illustrate the principles of the invention. Fundamentally, the system comprises a central processor 100 and one or more switching modules 102-1 to 102-N. In the illustrative system, central processor 100 is a commercially available processor. It handles the functions that require centralized intelligence, including allocation of resources, overall maintenance, and interface with operations support systems for record keeping, troubleshooting, and so forth.
The central processor 100 is connected to the switch modules, a message switch 104 and a time-multiplexed switch 106. ~essage switch 104 directs the routing of control messages between central processor 100 and the switch rnodules and between the switch modules themselves.
These .~essages travel through the time-multiplex switch 106.
The switch models 102 are microprocessor controlled units that provide most call processing functions. They provide the interfaces between the system and stations and trunks, 108 and 110. Each switch module contains a time slot interchange unit that performs the first stage of switching. Connections involving more than a single switch module are provided by the time-multiplex switch 106.
Central processor 100 is associated with a random access memory 112, part of which is a CP database 114.
This database contains such items as office dependent data and customer data that requires centralized access for functions performed by CP 100. Each of the switch modules 102-l through 102-N is also associated with a separate random access memory 116-1 through 116-N, part of which is a switch module database (SMDB) 118-1 through 118-N. The SMDBs typically contain office dependent data individual to the SM, such as station and trunk appearances, and feature data specific to the stations served by the SM. The CP
database 114 and the SM databases 118 make up a distributed database of the system. CP 100 is also associated with a disk memory 103 which, among other things, is used to store a most recent backup copy of the distributed database.
Another part of each SM memory 116 is a bit map 120. A SM database 118 is conceptually divided into pages of an arbitrary and fixed size. In the illustrative embodiment, a page is 128 bytes in length. When a modification is made to a SMDB 118, such as activation of a customer calling feature~ a "l" is entered into the appropriate bit map at a bit location defining the page ~J ~ ~L
containing the modification. This is illustrated in Fig. 2 in which a bit map having words 0 to P is shown, each assumed to have 10 bits each. To the right of the bit map is a page layout of a SMDB. As shown, the -first bit of the bit m~p is associated with page 0 of the database. The right-most bit of word 0 is associated with page 9 and is set to "l", indicating that page 9 has been modified since a last backup copy was taken.
The program control functions described below have been simplified in the interest of brevity and understanding. For example, the flowcharts of ~igs. 3 through 5 are drawn without concern for such things as real time breaks in program flow, which are commonp]ace in the industry and within the skill of the ordinary art worker.
Database backup may be scheduled to execute periodically, say once a day, or to be executed on demand from, say, a system operator. In either event, entry is made to CP 100 program address START in Fig. 3 to begin the backup. START is a backup control program. Fundamentally J
it controls the successive execution of a backup subroutine shown in Fig. 4 for each SM 102 in an officeO ~ach time the backup subroutine is completed on all the SMs of an office, a pass is said to be completed. At least two and as many passes as desired may be performed. In accordance with the invention, modifications are allowed to occur in the SM databases 118 while backup is being performed during all passes except the last pass. The result is that during the initial passes in which the greater number of modifications are expected to be transmitted to CP 100, and thence to disk 103, the SMDBs 118 are still available for modification. During the final pass, SM database modification lockout occurs for only the very short period of time required to transmit the few, if any, modifications that have occurred to a SM database since the immediately preceding pass. Since modified pages are transmitted from each SMDB in sequential order, modifications that occur to a SM database, such as 118-1, at a page location that has already been examined during a pass on the database are backed~up during the ne~t pass on the database.
Three backup passes 1 through 3 are shown in Fig. 3 for illustration, although it has been Eound that in the exemplary system two passes reduce the modification lockout time to a satisfactory value. In FigO 3, step 300 sets a pass indicator to pass l. Steps 302 and 304 call the backup subroutine ~ACKUP sequentially for each SM of an office until the pass is executed on all SMs. At this point, steps 306, 308 and 310 execute pass 2 on all the SMs to backup intervening modifications to the SM databases that arrived too late to be included during pass l. In accordance with the invention, it is normally expected that the number of modifications backed-up by step 310 is much less than those backed-up by step 304.
After step 310 is executed on all SMs, step 312 sets the pass indicator to pass 3. Step 313 sets an indicator in the CP memory 112 to lockout modifications to the CP database 114. This is done because some CP database modifications cause related modifications to occur in the SM databases. Because modifications are not allowed to an SM that is undergoing a pass 3 backup, modifications must also be disallowed to the CP database.
Steps 314 and 316 now execute the backup subroutine sequentially on each of the SMs 102. When the last SM is completed, step 318 backs up the CP database 114 by copying the entire CP database to disk 103. Since there is no slow communication channel between the CP database and CP 100 and because there is only one CP database, there is no need to backup the CP database in passes. The speed of generating the CP database backup in disk 103 is sufficient to not lock out modifications for an unduly long period of time in this embodiment. Howe~er, it is noted that the CP backup could be generated in passes to avoid such a problem if circumstances were to so warrant.
After backup of the CP database is complete, step 320 unlocks the database by resetting the CP lock indication in memory 112. At this point backup is complete. A copy of the CP database as it e~ists at this point in tim~ and a copy of each of the SM databases as they existed at the time of completion of pass 3 on each individual database exists in disk 103.
Fig. 4 shows the details of the BACKUP subroutine that controls the operations of CP 100. Step 400 determines if pass 3 is in progress. If not, update lockup is not in effect and step 402 causes CP 100 to send a backup alert message to the SM on which this pass is being executed. This alert message includes an "unlocked" flag for passes 1 and 2. On the other hand, if pass 3 is in effect, step 404 sends the alert message to the SM, including a "lock" flag. Fig. 5 shows the details of the program that controls the microprocessors in SMs 102 in response to control messages from CP 100. Step 504 in the SM 102 being addressed recognizes the alert message from CP
100. Step 506 determines if the alert message includes a request to lockout database modifications. If so, step 508 places the lockout state into effect. In either event, step 510 next returns an acknowledge (ACK) message to CP
100 that all is ready to begin the pass.
Step 406 in the CP 100 program recognizes receipt of the ACK message resulting in step 408 transmitting a backup initiation message to the SM. Referring again to Fig. 5, step 502 recognizes the initiation message. In response, step 512 performs certain minor initialization functions such as setting a bit map search pointer to start at the beginning of the bit map. Step 514 begins a search of the bit map shown in Fig. 2 to locate the next "l"
therein indicating a page rnodification. If no "l" is found, steps 516 and 530 result in the generation and transmission of a message to CP 100 with the "finished"
flag set. Step 534 looks for a responsive ACK message from CP 100 and terminates SM START program operation when it is received. On the other hand, assuming that a first "ll' is found, step 520 translates the position of the "l" in the bit map into a page address in the appropriate SM database 118. Step 522 clears the "l" in the bit map. Step 52~
transmits the page associated with the first "1" to CP 100 with the finished flag set to "0" (not finished). Step 532 5 waits for an acknowledge (ACK) message from CP 100 and continues at step 514 when the ACK message is received to locate the ne~t "l" in the bit map. This process continues until all modified pages as indicated in the bit map are transmitted to CP 100.
The above description of the SM backup program is somewhat simplified from what has been found to be preferred. In the specific system described in Fig. 1, it is efficient to transmit up to five modified pages at a time to CP 100 without waiting for an ackncwledge (ACK) message from the CP, rather than one page at a time as illustrated in Fig. 5. This, however, is expected to vary with particular system environments and an appropriate revision of Fig. 5 along these lines is well within the state of art of skilled art workers.
With reference again to the CP 100 program shown in Fig. 4, step 410 receives each transmission of a modified page from an SM then active in a pass. Step 411 returns an acknowledgement (ACK) message to the SM in response to the ACK message. Step 412 tests the "finished"
flag in the message to determine if backup is complete on this pass for this SM. If the flag is not set, the message contains a page of data. Step 414 merges the page into the previous backup copy which exists on disk 103. The process then continues on this SM at step 410. Otherwise, step 424 transmits a database update unlock message to the SM just completed. This message is decoded at step 500 of the SM
program in Fig. 5, causing step 501 to unlock modifications to the SM database. This step actually is effective only for the last pass (pass 3), since updates are already unlocked for the earlier passes.
Referring again to ~ig. 4, at step 426 the CP 100 backup subroutine returns to the appropriate point at step 304, 310 or 316 in the main program after transmitting the unlock message.
In view of the above teaching it is seen that the ~SM databases 11~ are available for updates by users virtually the entire time of backup. Even during the last pass (pass 3), only the SM database actively being backed at any time is locked to updates. Moreover, the differential backup, i.e., the transmission only of modified pages and the merging of the differential updates into the permanent backup disk copy greatly decreases the amount of data re~uired to be processed over the classic full copy method.
It is to be understood that the above-described arrangement is merely illustrative of the application of the principles of the invention and that other arrange~ents may be devised by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. In a distributed data base system having a central computer, a central computer main memory, a central computer mass memory, and a plurality of peripheral data base memories, a method of generating a backup copy of the contents of each of the peripheral data base memories in the central computer mass memory, comprising the steps of setting indications of modifications to the stored contents of a peripheral memory as modifications are made, executing a plurality of update passes on each of the peripheral memories, wherein each pass except the last pass includes allowing update modifications to occur to the peripheral memory being backed-up at a given time during execution of the pass, sequentially examining the modification indications and transmitting indicated modifications of the peripheral memory being backed-up at a given time from the peripheral memory to the mass memory, removing indications of modifications as the modifications are transmitted to the mass memory, executing a last update pass on each of the peripheral memories, wherein the last pass includes inhibiting update modifications to the peripheral memory being updated at a given time, and transmitting all modifications to the peripheral memory being backed-up indicated to be present at the beginning of the last pass to the mass memory.
2. The method of claim 1 wherein each of the peripheral memories is partitioned into pages of a prescribed size and the setting indications step further comprises setting a bit in a bit map contained in a said peripheral memory and corresponding to a page in the peripheral memory to a prescribed state to indicate a modification to that page.
3. The method of claim 2 wherein the steps of transmitting modifications further comprises sequentially scanning the bit map for the next bit set to the first prescribed state, setting the next bit found to a second prescribed state, and transmitting the contents of the page of the peripheral memory identified by the bit to the mass memory.
4. The method of claim 3 wherein the step of sequentially scanning the bit map further comprises resuming the sequential scanning of the bit map at the immediate next bit address after having located a bit set to the first prescribed state and transmitting the corresponding page to the central computer.
5. In a distributed data base system having a central computer, a central computer main memory, a central computer mass memory, and a plurality of peripheral data base memories, a method of generating a backup copy of each of the peripheral data base memories in the central computer mass memory, comprising the steps of A. maintaining a record of modification indications for each of the peripheral data base memories in the respective peripheral data base memory as information is modified in the peripheral memories, B. in response to a request by the central computer, sequentially locating any indications in the record and transmitting the associated modifications from a first one of the peripheral memories to the central computer and thence to the mass memory while allowing additional modifications to occur in all of the peripheral memories, C. clearing a modification indication in the record as each associated modification is transmitted to the central computer, D. repeating steps B and C for each of the remaining peripheral memories, E. at the completion of step D, repeating steps B, C and D zero, one or more times, F. at the completion of step E, inhibiting modifications to the first peripheral memory, G. at the completion of step F, sequentially locating any indication in the record and transmitting associated modifications in the first peripheral memory to the central computer and thence to the mass memory, H. clearing a modification indication in the record as each associated modification is transmitted to the central computer, and I. repeating steps F, G and H for each of the remaining peripheral memories.
6. The method of claim 5 wherein a said record of modification indications is a bit-map with each bit therein corresponding to a unique and identifiable page of a prescribed size in a corresponding one of the peripheral memories, and the step of maintaining the records further comprises setting to a first prescribed state a bit in the record corresponding to a page which has been modified.
7. The method of claim 6 wherein steps B and G
further comprise sequentially transmitting to the central computer all pages of the peripheral memory whose corresponding bits in the bit-map are set to the first prescribed state.
further comprise sequentially transmitting to the central computer all pages of the peripheral memory whose corresponding bits in the bit-map are set to the first prescribed state.
8. The method of claim 7 wherein step C further comprises setting appropriate bits in the bit-map to a second prescribed state.
9. The method of claim 7 wherein the step of sequentially transmitting all pages of the peripheral memory whose corresponding bits in the bit-map are set to the first prescribed state further comprises sequentially searching the bit-map for bits set to the first prescribed state, and transmitting the corresponding peripheral memory pages as such bits are found without regard to preceding bits of the bit-map which have priorly been examined during the instant pass and whose corresponding peripheral memory pages may have undergone a subsequent modification.
10. The method of claim 9 further comprising transmitting to the central computer a "finished"
indication when the last page of the peripheral memory having its bit in the bit-map set to the first prescribed state has been transmitted to the central computer.
indication when the last page of the peripheral memory having its bit in the bit-map set to the first prescribed state has been transmitted to the central computer.
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Families Citing this family (497)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2591774B1 (en) * | 1985-11-06 | 1996-07-12 | Canon Kk | FILE SYSTEM |
US4897781A (en) * | 1987-02-13 | 1990-01-30 | International Business Machines Corporation | System and method for using cached data at a local node after re-opening a file at a remote node in a distributed networking environment |
US4931997A (en) * | 1987-03-16 | 1990-06-05 | Hitachi Ltd. | Semiconductor memory having storage buffer to save control data during bulk erase |
EP0303856B1 (en) * | 1987-08-20 | 1995-04-05 | International Business Machines Corporation | Method and apparatus for maintaining duplex-paired devices by means of a dual copy function |
US5051887A (en) * | 1987-08-25 | 1991-09-24 | International Business Machines Corporation | Maintaining duplex-paired storage devices during gap processing using of a dual copy function |
US4853843A (en) * | 1987-12-18 | 1989-08-01 | Tektronix, Inc. | System for merging virtual partitions of a distributed database |
JPH0743676B2 (en) * | 1988-03-11 | 1995-05-15 | 株式会社日立製作所 | Back-up data dump control method and device |
US4945474A (en) * | 1988-04-08 | 1990-07-31 | Internatinal Business Machines Corporation | Method for restoring a database after I/O error employing write-ahead logging protocols |
US5146561A (en) * | 1988-06-02 | 1992-09-08 | Sears Communications Network, Inc. | Communication network data manager system |
US4992935A (en) * | 1988-07-12 | 1991-02-12 | International Business Machines Corporation | Bit map search by competitive processors |
US5175849A (en) * | 1988-07-28 | 1992-12-29 | Amdahl Corporation | Capturing data of a database system |
KR900005300A (en) * | 1988-09-13 | 1990-04-13 | 윌슨 디.파아고 | Hot backup file server machine |
US5136707A (en) * | 1988-10-28 | 1992-08-04 | At&T Bell Laboratories | Reliable database administration arrangement |
JPH0373037A (en) * | 1989-05-26 | 1991-03-28 | Hitachi Ltd | Data base fault recovering method |
JPH032939A (en) * | 1989-05-30 | 1991-01-09 | Hitachi Ltd | Data control method |
US5239637A (en) * | 1989-06-30 | 1993-08-24 | Digital Equipment Corporation | Digital data management system for maintaining consistency of data in a shadow set |
US5210865A (en) * | 1989-06-30 | 1993-05-11 | Digital Equipment Corporation | Transferring data between storage media while maintaining host processor access for I/O operations |
EP0405859B1 (en) * | 1989-06-30 | 1997-09-17 | Digital Equipment Corporation | Method and apparatus for managing a shadow set of storage media |
US5247618A (en) * | 1989-06-30 | 1993-09-21 | Digital Equipment Corporation | Transferring data in a digital data processing system |
EP0405926B1 (en) * | 1989-06-30 | 1996-12-04 | Digital Equipment Corporation | Method and apparatus for managing a shadow set of storage media |
US5454099A (en) * | 1989-07-25 | 1995-09-26 | International Business Machines Corporation | CPU implemented method for backing up modified data sets in non-volatile store for recovery in the event of CPU failure |
US5163148A (en) * | 1989-08-11 | 1992-11-10 | Digital Equipment Corporation | File backup system for producing a backup copy of a file which may be updated during backup |
US5093911A (en) * | 1989-09-14 | 1992-03-03 | International Business Machines Corporation | Storage and retrieval system |
US5412801A (en) * | 1990-01-17 | 1995-05-02 | E-Net | Gap recovery for off-site data storage and recovery systems |
EP0465019B1 (en) * | 1990-06-29 | 1997-05-14 | Oracle Corporation | Method and apparatus for managing state identifiers for efficient recovery |
DE69126066T2 (en) * | 1990-06-29 | 1997-09-25 | Oracle Corp | Method and device for optimizing logbook usage |
US5544347A (en) | 1990-09-24 | 1996-08-06 | Emc Corporation | Data storage system controlled remote data mirroring with respectively maintained data indices |
US5386553A (en) * | 1990-10-10 | 1995-01-31 | Fuji Xerox Co., Ltd. | Disk file updating control device and method using updating data stored in a first-in-first-out queue |
JPH0644218B2 (en) * | 1990-10-22 | 1994-06-08 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Method and apparatus for managing mirrored storage device |
US5274807A (en) * | 1990-11-01 | 1993-12-28 | At&T Bell Laboratories | Method for reducing magnetic storage volume for computer disk image backup |
DE69119222T2 (en) * | 1991-06-04 | 1996-11-21 | Ibm | Data backup and elimination in a data processing system |
CA2071346A1 (en) * | 1991-10-18 | 1993-04-19 | Claus William Mikkelsen | Method and means for time zero backup copy of data |
CA2055295C (en) * | 1991-11-12 | 2000-05-23 | Jean Gilles Fecteau | Logical mapping of data objects using data spaces |
US5263154A (en) * | 1992-04-20 | 1993-11-16 | International Business Machines Corporation | Method and system for incremental time zero backup copying of data |
US5404508A (en) * | 1992-12-03 | 1995-04-04 | Unisys Corporation | Data base backup and recovery system and method |
SE500599C2 (en) * | 1992-12-08 | 1994-07-25 | Ellemtel Utvecklings Ab | Ways to optimize memory space in a database |
SE500656C2 (en) * | 1992-12-08 | 1994-08-01 | Ellemtel Utvecklings Ab | Backup capture system in a distributed database |
US5896531A (en) * | 1993-02-26 | 1999-04-20 | International Business Machines Corporation | Method and system for managing environments with a data processing system |
US5787444A (en) * | 1993-03-15 | 1998-07-28 | International Business Machines Corp. | Method and apparatus for maintaining revision contol of a set of objects within a data processing system |
US5408649A (en) * | 1993-04-30 | 1995-04-18 | Quotron Systems, Inc. | Distributed data access system including a plurality of database access processors with one-for-N redundancy |
US5675725A (en) * | 1993-07-19 | 1997-10-07 | Cheyenne Advanced Technology Limited | Computer backup system operable with open files |
US5642496A (en) * | 1993-09-23 | 1997-06-24 | Kanfi; Arnon | Method of making a backup copy of a memory over a plurality of copying sessions |
US5515502A (en) * | 1993-09-30 | 1996-05-07 | Sybase, Inc. | Data backup system with methods for stripe affinity backup to multiple archive devices |
CA2178213C (en) * | 1993-12-10 | 2005-06-28 | Peter Bryan Malcolm | Incremental backup system |
US5617566A (en) * | 1993-12-10 | 1997-04-01 | Cheyenne Advanced Technology Ltd. | File portion logging and arching by means of an auxilary database |
WO1995019008A1 (en) * | 1994-01-05 | 1995-07-13 | Covey Peter J | Dynamic-state, multi-dimensional, multi-media database |
JP2708386B2 (en) * | 1994-03-18 | 1998-02-04 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Method and apparatus for recovering duplicate database through simultaneous update and copy procedure |
US5435004A (en) * | 1994-07-21 | 1995-07-18 | International Business Machines Corporation | Computerized system and method for data backup |
US5574906A (en) * | 1994-10-24 | 1996-11-12 | International Business Machines Corporation | System and method for reducing storage requirement in backup subsystems utilizing segmented compression and differencing |
US5649158A (en) * | 1995-02-23 | 1997-07-15 | International Business Machines Corporation | Method for incrementally archiving primary storage to archive storage by utilizing both a partition archive status array and a partition map |
GB9506501D0 (en) * | 1995-03-30 | 1995-05-17 | Int Computers Ltd | Incremental disk backup |
US6453325B1 (en) * | 1995-05-24 | 2002-09-17 | International Business Machines Corporation | Method and means for backup and restoration of a database system linked to a system for filing data |
US6029175A (en) * | 1995-10-26 | 2000-02-22 | Teknowledge Corporation | Automatic retrieval of changed files by a network software agent |
US6366930B1 (en) | 1996-04-12 | 2002-04-02 | Computer Associates Think, Inc. | Intelligent data inventory & asset management systems method and apparatus |
US5644698A (en) * | 1996-05-30 | 1997-07-01 | International Business Machines Corporation | Configurable reuse delay criterion for storage volumes |
US5842222A (en) * | 1996-10-04 | 1998-11-24 | Taiwan Semiconductor Manufacturing Company, Ltd. | Production information system enhanced for availability |
US5794254A (en) * | 1996-12-03 | 1998-08-11 | Fairbanks Systems Group | Incremental computer file backup using a two-step comparison of first two characters in the block and a signature with pre-stored character and signature sets |
US6038665A (en) * | 1996-12-03 | 2000-03-14 | Fairbanks Systems Group | System and method for backing up computer files over a wide area computer network |
US7209972B1 (en) | 1997-10-30 | 2007-04-24 | Commvault Systems, Inc. | High speed data transfer mechanism |
US6418478B1 (en) * | 1997-10-30 | 2002-07-09 | Commvault Systems, Inc. | Pipelined high speed data transfer mechanism |
US7581077B2 (en) * | 1997-10-30 | 2009-08-25 | Commvault Systems, Inc. | Method and system for transferring data in a storage operation |
US6397229B1 (en) * | 1998-02-02 | 2002-05-28 | International Business Machines Corporation | Storage-controller-managed outboard incremental backup/restore of data |
US7277941B2 (en) | 1998-03-11 | 2007-10-02 | Commvault Systems, Inc. | System and method for providing encryption in a storage network by storing a secured encryption key with encrypted archive data in an archive storage device |
US7739381B2 (en) | 1998-03-11 | 2010-06-15 | Commvault Systems, Inc. | System and method for providing encryption in storage operations in a storage network, such as for use by application service providers that provide data storage services |
US6226651B1 (en) | 1998-03-27 | 2001-05-01 | International Business Machines Corporation | Database disaster remote site recovery |
US6976093B2 (en) * | 1998-05-29 | 2005-12-13 | Yahoo! Inc. | Web server content replication |
US6366986B1 (en) * | 1998-06-30 | 2002-04-02 | Emc Corporation | Method and apparatus for differential backup in a computer storage system |
US6269381B1 (en) | 1998-06-30 | 2001-07-31 | Emc Corporation | Method and apparatus for backing up data before updating the data and for restoring from the backups |
KR100293937B1 (en) * | 1998-07-27 | 2001-07-12 | 윤종용 | Atomatic database backup method in private exchange |
US9361243B2 (en) | 1998-07-31 | 2016-06-07 | Kom Networks Inc. | Method and system for providing restricted access to a storage medium |
US8234477B2 (en) | 1998-07-31 | 2012-07-31 | Kom Networks, Inc. | Method and system for providing restricted access to a storage medium |
US6269431B1 (en) | 1998-08-13 | 2001-07-31 | Emc Corporation | Virtual storage and block level direct access of secondary storage for recovery of backup data |
US6366987B1 (en) | 1998-08-13 | 2002-04-02 | Emc Corporation | Computer data storage physical backup and logical restore |
US6353878B1 (en) | 1998-08-13 | 2002-03-05 | Emc Corporation | Remote control of backup media in a secondary storage subsystem through access to a primary storage subsystem |
EP0981099A3 (en) * | 1998-08-17 | 2004-04-21 | Connected Place Limited | A method of and an apparatus for merging a sequence of delta files |
CN1143214C (en) | 1998-09-18 | 2004-03-24 | 西门子公司 | Data state detection method |
US6209002B1 (en) | 1999-02-17 | 2001-03-27 | Emc Corporation | Method and apparatus for cascading data through redundant data storage units |
US6662197B1 (en) * | 1999-06-25 | 2003-12-09 | Emc Corporation | Method and apparatus for monitoring update activity in a data storage facility |
US6415300B1 (en) | 1999-07-06 | 2002-07-02 | Syncsort Incorporated | Method of performing a high-performance backup which gains efficiency by reading input file blocks sequentially |
US6408314B1 (en) | 1999-07-06 | 2002-06-18 | Synscort Incorporated | Method of performing a high-performance sort which gains efficiency by reading input file blocks sequentially |
US7035880B1 (en) | 1999-07-14 | 2006-04-25 | Commvault Systems, Inc. | Modular backup and retrieval system used in conjunction with a storage area network |
US7389311B1 (en) | 1999-07-15 | 2008-06-17 | Commvault Systems, Inc. | Modular backup and retrieval system |
US7395282B1 (en) | 1999-07-15 | 2008-07-01 | Commvault Systems, Inc. | Hierarchical backup and retrieval system |
US6434681B1 (en) | 1999-12-02 | 2002-08-13 | Emc Corporation | Snapshot copy facility for a data storage system permitting continued host read/write access |
US6549992B1 (en) | 1999-12-02 | 2003-04-15 | Emc Corporation | Computer data storage backup with tape overflow control of disk caching of backup data stream |
CN1411580A (en) * | 2000-01-10 | 2003-04-16 | 连接公司 | Administration of differential backup system in client-server environment |
US6658436B2 (en) * | 2000-01-31 | 2003-12-02 | Commvault Systems, Inc. | Logical view and access to data managed by a modular data and storage management system |
US7434219B2 (en) * | 2000-01-31 | 2008-10-07 | Commvault Systems, Inc. | Storage of application specific profiles correlating to document versions |
US7003641B2 (en) | 2000-01-31 | 2006-02-21 | Commvault Systems, Inc. | Logical view with granular access to exchange data managed by a modular data and storage management system |
US7155481B2 (en) | 2000-01-31 | 2006-12-26 | Commvault Systems, Inc. | Email attachment management in a computer system |
US6938039B1 (en) | 2000-06-30 | 2005-08-30 | Emc Corporation | Concurrent file across at a target file server during migration of file systems between file servers using a network file system access protocol |
US6823336B1 (en) | 2000-09-26 | 2004-11-23 | Emc Corporation | Data storage system and method for uninterrupted read-only access to a consistent dataset by one host processor concurrent with read-write access by another host processor |
EP1334114A2 (en) * | 2000-10-25 | 2003-08-13 | Mayo Foundation For Medical Education And Research | Transcobalamin binding conjugates useful for treating abnormal cellular proliferation |
US6667022B2 (en) * | 2001-08-14 | 2003-12-23 | General Electric Co. | Process for separating synthesis gas into fuel cell quality hydrogen and sequestration ready carbon dioxide |
JP2005505039A (en) * | 2001-09-28 | 2005-02-17 | コムヴォールト・システムズ・インコーポレーテッド | Apparatus and method for archiving objects in an information storage device |
EP1436873B1 (en) | 2001-09-28 | 2009-04-29 | Commvault Systems, Inc. | System and method for generating and managing quick recovery volumes |
US8346733B2 (en) | 2006-12-22 | 2013-01-01 | Commvault Systems, Inc. | Systems and methods of media management, such as management of media to and from a media storage library |
US20050033913A1 (en) * | 2003-04-03 | 2005-02-10 | Rajiv Kottomtharayil | Method and system for controlling a robotic arm in a storage device |
AU2002365580A1 (en) * | 2001-11-23 | 2003-06-10 | Commvault Systems, Inc. | Selective data replication system and method |
US7584227B2 (en) * | 2005-12-19 | 2009-09-01 | Commvault Systems, Inc. | System and method for containerized data storage and tracking |
US20030101155A1 (en) * | 2001-11-23 | 2003-05-29 | Parag Gokhale | Method and system for scheduling media exports |
US7603518B2 (en) | 2005-12-19 | 2009-10-13 | Commvault Systems, Inc. | System and method for improved media identification in a storage device |
US7546364B2 (en) * | 2002-05-16 | 2009-06-09 | Emc Corporation | Replication of remote copy data for internet protocol (IP) transmission |
US6957362B2 (en) * | 2002-08-06 | 2005-10-18 | Emc Corporation | Instantaneous restoration of a production copy from a snapshot copy in a data storage system |
US6792518B2 (en) | 2002-08-06 | 2004-09-14 | Emc Corporation | Data storage system having mata bit maps for indicating whether data blocks are invalid in snapshot copies |
US6934822B2 (en) * | 2002-08-06 | 2005-08-23 | Emc Corporation | Organization of multiple snapshot copies in a data storage system |
AU2003270482A1 (en) * | 2002-09-09 | 2004-03-29 | Commvault Systems, Inc. | Dynamic storage device pooling in a computer system |
US7162496B2 (en) * | 2002-09-16 | 2007-01-09 | Commvault Systems, Inc. | System and method for blind media support |
US8370542B2 (en) | 2002-09-16 | 2013-02-05 | Commvault Systems, Inc. | Combined stream auxiliary copy system and method |
CA2508089A1 (en) * | 2002-10-07 | 2004-04-22 | Commvault Systems, Inc. | System and method for managing stored data |
US20040133583A1 (en) * | 2002-11-20 | 2004-07-08 | Tingey Kenneth B. | system architecture and method for entering and accessing entity data in events accounting |
US7284016B2 (en) | 2002-12-03 | 2007-10-16 | Emc Corporation | Client-server protocol for directory access of snapshot file systems in a storage system |
US20050039069A1 (en) * | 2003-04-03 | 2005-02-17 | Anand Prahlad | Remote disaster data recovery system and method |
US7246207B2 (en) | 2003-04-03 | 2007-07-17 | Commvault Systems, Inc. | System and method for dynamically performing storage operations in a computer network |
WO2004090789A2 (en) | 2003-04-03 | 2004-10-21 | Commvault Systems, Inc. | System and method for extended media retention |
WO2004090675A2 (en) * | 2003-04-03 | 2004-10-21 | Commvault Systems, Inc. | System and method for performing storage operations through a firewall |
EP1623300A2 (en) * | 2003-05-14 | 2006-02-08 | Rhysome, Inc. | Method and system for reducing information latency in a business enterprise |
US7454569B2 (en) * | 2003-06-25 | 2008-11-18 | Commvault Systems, Inc. | Hierarchical system and method for performing storage operations in a computer network |
US7035881B2 (en) * | 2003-09-23 | 2006-04-25 | Emc Corporation | Organization of read-write snapshot copies in a data storage system |
US7133983B2 (en) | 2003-09-29 | 2006-11-07 | International Business Machines Corporation | Method, system, and program for asynchronous copy |
WO2005050381A2 (en) | 2003-11-13 | 2005-06-02 | Commvault Systems, Inc. | Systems and methods for performing storage operations using network attached storage |
US7613748B2 (en) | 2003-11-13 | 2009-11-03 | Commvault Systems, Inc. | Stored data reverification management system and method |
CA2544064C (en) | 2003-11-13 | 2012-02-07 | Commvault Systems, Inc. | System and method for performing integrated storage operations |
WO2005048085A2 (en) | 2003-11-13 | 2005-05-26 | Commvault Systems, Inc. | System and method for performing an image level snapshot and for restoring partial volume data |
US7440982B2 (en) | 2003-11-13 | 2008-10-21 | Commvault Systems, Inc. | System and method for stored data archive verification |
WO2005065084A2 (en) * | 2003-11-13 | 2005-07-21 | Commvault Systems, Inc. | System and method for providing encryption in pipelined storage operations in a storage network |
GB2424297B (en) * | 2003-11-13 | 2007-06-27 | Commvault Systems Inc | System and method for data storage and tracking |
US7383463B2 (en) * | 2004-02-04 | 2008-06-03 | Emc Corporation | Internet protocol based disaster recovery of a server |
US8266406B2 (en) | 2004-04-30 | 2012-09-11 | Commvault Systems, Inc. | System and method for allocation of organizational resources |
US7343356B2 (en) | 2004-04-30 | 2008-03-11 | Commvault Systems, Inc. | Systems and methods for storage modeling and costing |
GB2417800A (en) * | 2004-09-07 | 2006-03-08 | Siemens Ag | Data updating management apparatus and method |
US8725705B2 (en) * | 2004-09-15 | 2014-05-13 | International Business Machines Corporation | Systems and methods for searching of storage data with reduced bandwidth requirements |
US7523098B2 (en) | 2004-09-15 | 2009-04-21 | International Business Machines Corporation | Systems and methods for efficient data searching, storage and reduction |
WO2006052872A2 (en) | 2004-11-05 | 2006-05-18 | Commvault Systems, Inc. | System and method to support single instance storage operations |
US7490207B2 (en) * | 2004-11-08 | 2009-02-10 | Commvault Systems, Inc. | System and method for performing auxillary storage operations |
US8959299B2 (en) | 2004-11-15 | 2015-02-17 | Commvault Systems, Inc. | Using a snapshot as a data source |
US8832706B2 (en) | 2006-12-22 | 2014-09-09 | Commvault Systems, Inc. | Systems and methods of data storage management, such as dynamic data stream allocation |
US8140786B2 (en) * | 2006-12-04 | 2012-03-20 | Commvault Systems, Inc. | Systems and methods for creating copies of data, such as archive copies |
US8775823B2 (en) | 2006-12-29 | 2014-07-08 | Commvault Systems, Inc. | System and method for encrypting secondary copies of data |
US20060143412A1 (en) * | 2004-12-28 | 2006-06-29 | Philippe Armangau | Snapshot copy facility maintaining read performance and write performance |
US8112605B2 (en) * | 2005-05-02 | 2012-02-07 | Commvault Systems, Inc. | System and method for allocation of organizational resources |
US7602906B2 (en) * | 2005-08-25 | 2009-10-13 | Microsoft Corporation | Cipher for disk encryption |
US8271548B2 (en) * | 2005-11-28 | 2012-09-18 | Commvault Systems, Inc. | Systems and methods for using metadata to enhance storage operations |
US20070185926A1 (en) | 2005-11-28 | 2007-08-09 | Anand Prahlad | Systems and methods for classifying and transferring information in a storage network |
US7543125B2 (en) * | 2005-12-19 | 2009-06-02 | Commvault Systems, Inc. | System and method for performing time-flexible calendric storage operations |
EP1974296B8 (en) | 2005-12-19 | 2016-09-21 | Commvault Systems, Inc. | Systems and methods for performing data replication |
US7636743B2 (en) | 2005-12-19 | 2009-12-22 | Commvault Systems, Inc. | Pathname translation in a data replication system |
US8930496B2 (en) | 2005-12-19 | 2015-01-06 | Commvault Systems, Inc. | Systems and methods of unified reconstruction in storage systems |
US7962709B2 (en) | 2005-12-19 | 2011-06-14 | Commvault Systems, Inc. | Network redirector systems and methods for performing data replication |
US7617253B2 (en) | 2005-12-19 | 2009-11-10 | Commvault Systems, Inc. | Destination systems and methods for performing data replication |
US7606844B2 (en) | 2005-12-19 | 2009-10-20 | Commvault Systems, Inc. | System and method for performing replication copy storage operations |
US7651593B2 (en) | 2005-12-19 | 2010-01-26 | Commvault Systems, Inc. | Systems and methods for performing data replication |
US20200257596A1 (en) | 2005-12-19 | 2020-08-13 | Commvault Systems, Inc. | Systems and methods of unified reconstruction in storage systems |
US7620710B2 (en) * | 2005-12-19 | 2009-11-17 | Commvault Systems, Inc. | System and method for performing multi-path storage operations |
US8655850B2 (en) | 2005-12-19 | 2014-02-18 | Commvault Systems, Inc. | Systems and methods for resynchronizing information |
US7457790B2 (en) * | 2005-12-19 | 2008-11-25 | Commvault Systems, Inc. | Extensible configuration engine system and method |
US20110010518A1 (en) | 2005-12-19 | 2011-01-13 | Srinivas Kavuri | Systems and Methods for Migrating Components in a Hierarchical Storage Network |
WO2007097826A2 (en) * | 2005-12-19 | 2007-08-30 | Commvault Systems, Inc. | System and method for providing a flexible licensing system for digital content |
US20070166674A1 (en) * | 2005-12-19 | 2007-07-19 | Kochunni Jaidev O | Systems and methods for generating configuration metrics in a storage network |
US8572330B2 (en) | 2005-12-19 | 2013-10-29 | Commvault Systems, Inc. | Systems and methods for granular resource management in a storage network |
US7617262B2 (en) * | 2005-12-19 | 2009-11-10 | Commvault Systems, Inc. | Systems and methods for monitoring application data in a data replication system |
US7613750B2 (en) * | 2006-05-29 | 2009-11-03 | Microsoft Corporation | Creating frequent application-consistent backups efficiently |
US8726242B2 (en) | 2006-07-27 | 2014-05-13 | Commvault Systems, Inc. | Systems and methods for continuous data replication |
US7539783B2 (en) | 2006-09-22 | 2009-05-26 | Commvault Systems, Inc. | Systems and methods of media management, such as management of media to and from a media storage library, including removable media |
CN101529419B (en) | 2006-10-17 | 2013-05-01 | 慷孚系统公司 | Method and system for offline indexing of content and classifying stored data |
US8655914B2 (en) | 2006-10-17 | 2014-02-18 | Commvault Systems, Inc. | System and method for storage operation access security |
US7882077B2 (en) | 2006-10-17 | 2011-02-01 | Commvault Systems, Inc. | Method and system for offline indexing of content and classifying stored data |
US8370442B2 (en) | 2008-08-29 | 2013-02-05 | Commvault Systems, Inc. | Method and system for leveraging identified changes to a mail server |
US8589341B2 (en) | 2006-12-04 | 2013-11-19 | Sandisk Il Ltd. | Incremental transparent file updating |
US20080147878A1 (en) * | 2006-12-15 | 2008-06-19 | Rajiv Kottomtharayil | System and methods for granular resource management in a storage network |
US8677091B2 (en) | 2006-12-18 | 2014-03-18 | Commvault Systems, Inc. | Writing data and storage system specific metadata to network attached storage device |
US7734669B2 (en) | 2006-12-22 | 2010-06-08 | Commvault Systems, Inc. | Managing copies of data |
US20080228771A1 (en) | 2006-12-22 | 2008-09-18 | Commvault Systems, Inc. | Method and system for searching stored data |
US7831566B2 (en) | 2006-12-22 | 2010-11-09 | Commvault Systems, Inc. | Systems and methods of hierarchical storage management, such as global management of storage operations |
US8312323B2 (en) | 2006-12-22 | 2012-11-13 | Commvault Systems, Inc. | Systems and methods for remote monitoring in a computer network and reporting a failed migration operation without accessing the data being moved |
US7840537B2 (en) | 2006-12-22 | 2010-11-23 | Commvault Systems, Inc. | System and method for storing redundant information |
US8719809B2 (en) | 2006-12-22 | 2014-05-06 | Commvault Systems, Inc. | Point in time rollback and un-installation of software |
US20080155205A1 (en) * | 2006-12-22 | 2008-06-26 | Parag Gokhale | Systems and methods of data storage management, such as dynamic data stream allocation |
US8290808B2 (en) | 2007-03-09 | 2012-10-16 | Commvault Systems, Inc. | System and method for automating customer-validated statement of work for a data storage environment |
US8707070B2 (en) | 2007-08-28 | 2014-04-22 | Commvault Systems, Inc. | Power management of data processing resources, such as power adaptive management of data storage operations |
US8706976B2 (en) | 2007-08-30 | 2014-04-22 | Commvault Systems, Inc. | Parallel access virtual tape library and drives |
US8396838B2 (en) | 2007-10-17 | 2013-03-12 | Commvault Systems, Inc. | Legal compliance, electronic discovery and electronic document handling of online and offline copies of data |
US7836174B2 (en) | 2008-01-30 | 2010-11-16 | Commvault Systems, Inc. | Systems and methods for grid-based data scanning |
US8296301B2 (en) | 2008-01-30 | 2012-10-23 | Commvault Systems, Inc. | Systems and methods for probabilistic data classification |
US8041679B1 (en) | 2008-06-04 | 2011-10-18 | Symantec Operating Corporation | Synthetic differential backups creation for a database using binary log conversion |
US8769048B2 (en) | 2008-06-18 | 2014-07-01 | Commvault Systems, Inc. | Data protection scheduling, such as providing a flexible backup window in a data protection system |
US8352954B2 (en) | 2008-06-19 | 2013-01-08 | Commvault Systems, Inc. | Data storage resource allocation by employing dynamic methods and blacklisting resource request pools |
US9128883B2 (en) | 2008-06-19 | 2015-09-08 | Commvault Systems, Inc | Data storage resource allocation by performing abbreviated resource checks based on relative chances of failure of the data storage resources to determine whether data storage requests would fail |
US8219524B2 (en) * | 2008-06-24 | 2012-07-10 | Commvault Systems, Inc. | Application-aware and remote single instance data management |
US9098495B2 (en) | 2008-06-24 | 2015-08-04 | Commvault Systems, Inc. | Application-aware and remote single instance data management |
US8484162B2 (en) | 2008-06-24 | 2013-07-09 | Commvault Systems, Inc. | De-duplication systems and methods for application-specific data |
US8335776B2 (en) | 2008-07-02 | 2012-12-18 | Commvault Systems, Inc. | Distributed indexing system for data storage |
US8166263B2 (en) | 2008-07-03 | 2012-04-24 | Commvault Systems, Inc. | Continuous data protection over intermittent connections, such as continuous data backup for laptops or wireless devices |
US8307177B2 (en) | 2008-09-05 | 2012-11-06 | Commvault Systems, Inc. | Systems and methods for management of virtualization data |
US8725688B2 (en) | 2008-09-05 | 2014-05-13 | Commvault Systems, Inc. | Image level copy or restore, such as image level restore without knowledge of data object metadata |
US20100070474A1 (en) | 2008-09-12 | 2010-03-18 | Lad Kamleshkumar K | Transferring or migrating portions of data objects, such as block-level data migration or chunk-based data migration |
US20100070466A1 (en) | 2008-09-15 | 2010-03-18 | Anand Prahlad | Data transfer techniques within data storage devices, such as network attached storage performing data migration |
AU2009296695B2 (en) | 2008-09-26 | 2013-08-01 | Commvault Systems, Inc. | Systems and methods for managing single instancing data |
US9015181B2 (en) * | 2008-09-26 | 2015-04-21 | Commvault Systems, Inc. | Systems and methods for managing single instancing data |
US8099572B1 (en) | 2008-09-30 | 2012-01-17 | Emc Corporation | Efficient backup and restore of storage objects in a version set |
US9178842B2 (en) | 2008-11-05 | 2015-11-03 | Commvault Systems, Inc. | Systems and methods for monitoring messaging applications for compliance with a policy |
US8412677B2 (en) * | 2008-11-26 | 2013-04-02 | Commvault Systems, Inc. | Systems and methods for byte-level or quasi byte-level single instancing |
US8204859B2 (en) | 2008-12-10 | 2012-06-19 | Commvault Systems, Inc. | Systems and methods for managing replicated database data |
US8943183B2 (en) | 2008-12-10 | 2015-01-27 | Commvault Systems, Inc. | Decoupled installation of data management systems |
US9495382B2 (en) | 2008-12-10 | 2016-11-15 | Commvault Systems, Inc. | Systems and methods for performing discrete data replication |
US8434131B2 (en) | 2009-03-20 | 2013-04-30 | Commvault Systems, Inc. | Managing connections in a data storage system |
US8401996B2 (en) | 2009-03-30 | 2013-03-19 | Commvault Systems, Inc. | Storing a variable number of instances of data objects |
US8209307B2 (en) | 2009-03-31 | 2012-06-26 | Commvault Systems, Inc. | Systems and methods for data migration in a clustered file system |
US8315981B2 (en) * | 2009-03-31 | 2012-11-20 | Commvault Systems, Inc. | Data mining systems and methods for heterogeneous data sources |
CN101551736B (en) * | 2009-05-20 | 2010-11-03 | 杭州华三通信技术有限公司 | Cache management device and method based on address pointer linked list |
US8578120B2 (en) | 2009-05-22 | 2013-11-05 | Commvault Systems, Inc. | Block-level single instancing |
US8849955B2 (en) | 2009-06-30 | 2014-09-30 | Commvault Systems, Inc. | Cloud storage and networking agents, including agents for utilizing multiple, different cloud storage sites |
US8930306B1 (en) | 2009-07-08 | 2015-01-06 | Commvault Systems, Inc. | Synchronized data deduplication |
US8719767B2 (en) | 2011-03-31 | 2014-05-06 | Commvault Systems, Inc. | Utilizing snapshots to provide builds to developer computing devices |
US9092500B2 (en) | 2009-09-03 | 2015-07-28 | Commvault Systems, Inc. | Utilizing snapshots for access to databases and other applications |
US8706867B2 (en) | 2011-03-31 | 2014-04-22 | Commvault Systems, Inc. | Realtime streaming of multimedia content from secondary storage devices |
US8433682B2 (en) | 2009-12-31 | 2013-04-30 | Commvault Systems, Inc. | Systems and methods for analyzing snapshots |
EP2519872A4 (en) | 2009-12-31 | 2015-08-26 | Commvault Systems Inc | Systems and methods for performing data management operations using snapshots |
US8442983B2 (en) | 2009-12-31 | 2013-05-14 | Commvault Systems, Inc. | Asynchronous methods of data classification using change journals and other data structures |
US8504517B2 (en) | 2010-03-29 | 2013-08-06 | Commvault Systems, Inc. | Systems and methods for selective data replication |
US8725698B2 (en) | 2010-03-30 | 2014-05-13 | Commvault Systems, Inc. | Stub file prioritization in a data replication system |
US8504515B2 (en) | 2010-03-30 | 2013-08-06 | Commvault Systems, Inc. | Stubbing systems and methods in a data replication environment |
US8352422B2 (en) | 2010-03-30 | 2013-01-08 | Commvault Systems, Inc. | Data restore systems and methods in a replication environment |
US8572719B2 (en) | 2010-05-28 | 2013-10-29 | Commvault Systems, Inc. | Firewall proxy systems and methods in a backup environment |
US8589347B2 (en) | 2010-05-28 | 2013-11-19 | Commvault Systems, Inc. | Systems and methods for performing data replication |
US11449394B2 (en) | 2010-06-04 | 2022-09-20 | Commvault Systems, Inc. | Failover systems and methods for performing backup operations, including heterogeneous indexing and load balancing of backup and indexing resources |
US8504526B2 (en) | 2010-06-04 | 2013-08-06 | Commvault Systems, Inc. | Failover systems and methods for performing backup operations |
US8504869B2 (en) | 2010-07-16 | 2013-08-06 | Commvault Systems, Inc. | Kernel swapping systems and methods for recovering a network device |
US8495420B2 (en) | 2010-07-16 | 2013-07-23 | Commvault Systems, Inc. | Registry key federation systems and methods |
US8578109B2 (en) | 2010-09-30 | 2013-11-05 | Commvault Systems, Inc. | Systems and methods for retaining and using data block signatures in data protection operations |
WO2012045021A2 (en) | 2010-09-30 | 2012-04-05 | Commvault Systems, Inc. | Efficient data management improvements, such as docking limited-feature data management modules to a full-featured data management system |
US8577851B2 (en) | 2010-09-30 | 2013-11-05 | Commvault Systems, Inc. | Content aligned block-based deduplication |
US9244779B2 (en) | 2010-09-30 | 2016-01-26 | Commvault Systems, Inc. | Data recovery operations, such as recovery from modified network data management protocol data |
US8935492B2 (en) | 2010-09-30 | 2015-01-13 | Commvault Systems, Inc. | Archiving data objects using secondary copies |
US9020900B2 (en) | 2010-12-14 | 2015-04-28 | Commvault Systems, Inc. | Distributed deduplicated storage system |
US8954446B2 (en) | 2010-12-14 | 2015-02-10 | Comm Vault Systems, Inc. | Client-side repository in a networked deduplicated storage system |
US9021198B1 (en) | 2011-01-20 | 2015-04-28 | Commvault Systems, Inc. | System and method for sharing SAN storage |
US8719264B2 (en) | 2011-03-31 | 2014-05-06 | Commvault Systems, Inc. | Creating secondary copies of data based on searches for content |
US8849762B2 (en) | 2011-03-31 | 2014-09-30 | Commvault Systems, Inc. | Restoring computing environments, such as autorecovery of file systems at certain points in time |
US9323466B2 (en) | 2011-04-27 | 2016-04-26 | Commvault Systems, Inc. | System and method for client policy assignment in a data storage system |
US9116633B2 (en) | 2011-09-30 | 2015-08-25 | Commvault Systems, Inc. | Information management of virtual machines having mapped storage devices |
US9461881B2 (en) | 2011-09-30 | 2016-10-04 | Commvault Systems, Inc. | Migration of existing computing systems to cloud computing sites or virtual machines |
US9372827B2 (en) | 2011-09-30 | 2016-06-21 | Commvault Systems, Inc. | Migration of an existing computing system to new hardware |
US9081653B2 (en) | 2011-11-16 | 2015-07-14 | Flextronics Ap, Llc | Duplicated processing in vehicles |
US20130227352A1 (en) | 2012-02-24 | 2013-08-29 | Commvault Systems, Inc. | Log monitoring |
US9471578B2 (en) | 2012-03-07 | 2016-10-18 | Commvault Systems, Inc. | Data storage system utilizing proxy device for storage operations |
US9298715B2 (en) | 2012-03-07 | 2016-03-29 | Commvault Systems, Inc. | Data storage system utilizing proxy device for storage operations |
US20130253977A1 (en) | 2012-03-23 | 2013-09-26 | Commvault Systems, Inc. | Automation of data storage activities |
US9286327B2 (en) | 2012-03-30 | 2016-03-15 | Commvault Systems, Inc. | Data storage recovery automation |
WO2013148096A1 (en) | 2012-03-30 | 2013-10-03 | Commvault Systems, Inc. | Informaton management of mobile device data |
US9262496B2 (en) | 2012-03-30 | 2016-02-16 | Commvault Systems, Inc. | Unified access to personal data |
US9063938B2 (en) | 2012-03-30 | 2015-06-23 | Commvault Systems, Inc. | Search filtered file system using secondary storage, including multi-dimensional indexing and searching of archived files |
US9639297B2 (en) | 2012-03-30 | 2017-05-02 | Commvault Systems, Inc | Shared network-available storage that permits concurrent data access |
US8950009B2 (en) | 2012-03-30 | 2015-02-03 | Commvault Systems, Inc. | Information management of data associated with multiple cloud services |
US9020890B2 (en) | 2012-03-30 | 2015-04-28 | Commvault Systems, Inc. | Smart archiving and data previewing for mobile devices |
US10157184B2 (en) | 2012-03-30 | 2018-12-18 | Commvault Systems, Inc. | Data previewing before recalling large data files |
US9342537B2 (en) | 2012-04-23 | 2016-05-17 | Commvault Systems, Inc. | Integrated snapshot interface for a data storage system |
US9189167B2 (en) | 2012-05-31 | 2015-11-17 | Commvault Systems, Inc. | Shared library in a data storage system |
US8977672B2 (en) | 2012-06-08 | 2015-03-10 | Commvault Systems, Inc. | Intelligent scheduling for remote computers |
US8892523B2 (en) | 2012-06-08 | 2014-11-18 | Commvault Systems, Inc. | Auto summarization of content |
US9189170B2 (en) | 2012-06-12 | 2015-11-17 | Commvault Systems, Inc. | External storage manager for a data storage cell |
US20130339298A1 (en) | 2012-06-13 | 2013-12-19 | Commvault Systems, Inc. | Collaborative backup in a networked storage system |
US20140025796A1 (en) | 2012-07-19 | 2014-01-23 | Commvault Systems, Inc. | Automated grouping of computing devices in a networked data storage system |
US9275086B2 (en) | 2012-07-20 | 2016-03-01 | Commvault Systems, Inc. | Systems and methods for database archiving |
US20140040580A1 (en) | 2012-07-31 | 2014-02-06 | Commvault Systems, Inc. | Administering a shared, on-line pool of data storage resources for performing data storage operations |
US8938481B2 (en) | 2012-08-13 | 2015-01-20 | Commvault Systems, Inc. | Generic file level restore from a block-level secondary copy |
US9026498B2 (en) | 2012-08-13 | 2015-05-05 | Commvault Systems, Inc. | Lightweight mounting of a secondary copy of file system data |
US20140181047A1 (en) | 2012-12-21 | 2014-06-26 | Commvault Systems, Inc. | Systems and methods to protect deleted files |
US9223597B2 (en) | 2012-12-21 | 2015-12-29 | Commvault Systems, Inc. | Archiving virtual machines in a data storage system |
US20140181085A1 (en) | 2012-12-21 | 2014-06-26 | Commvault Systems, Inc. | Data storage system for analysis of data across heterogeneous information management systems |
US10379988B2 (en) | 2012-12-21 | 2019-08-13 | Commvault Systems, Inc. | Systems and methods for performance monitoring |
US9201906B2 (en) | 2012-12-21 | 2015-12-01 | Commvault Systems, Inc. | Systems and methods to perform data backup in data storage systems |
US9747169B2 (en) | 2012-12-21 | 2017-08-29 | Commvault Systems, Inc. | Reporting using data obtained during backup of primary storage |
US9740702B2 (en) | 2012-12-21 | 2017-08-22 | Commvault Systems, Inc. | Systems and methods to identify unprotected virtual machines |
US9633216B2 (en) | 2012-12-27 | 2017-04-25 | Commvault Systems, Inc. | Application of information management policies based on operation with a geographic entity |
US9069799B2 (en) | 2012-12-27 | 2015-06-30 | Commvault Systems, Inc. | Restoration of centralized data storage manager, such as data storage manager in a hierarchical data storage system |
US9021452B2 (en) | 2012-12-27 | 2015-04-28 | Commvault Systems, Inc. | Automatic identification of storage requirements, such as for use in selling data storage management solutions |
US9378035B2 (en) | 2012-12-28 | 2016-06-28 | Commvault Systems, Inc. | Systems and methods for repurposing virtual machines |
US10346259B2 (en) | 2012-12-28 | 2019-07-09 | Commvault Systems, Inc. | Data recovery using a cloud-based remote data recovery center |
US9633022B2 (en) | 2012-12-28 | 2017-04-25 | Commvault Systems, Inc. | Backup and restoration for a deduplicated file system |
US20140196038A1 (en) | 2013-01-08 | 2014-07-10 | Commvault Systems, Inc. | Virtual machine management in a data storage system |
US9846620B2 (en) | 2013-01-11 | 2017-12-19 | Commvault Systems, Inc. | Table level database restore in a data storage system |
US9760444B2 (en) | 2013-01-11 | 2017-09-12 | Commvault Systems, Inc. | Sharing of secondary storage data |
US9665591B2 (en) | 2013-01-11 | 2017-05-30 | Commvault Systems, Inc. | High availability distributed deduplicated storage system |
US9886346B2 (en) | 2013-01-11 | 2018-02-06 | Commvault Systems, Inc. | Single snapshot for multiple agents |
US9262435B2 (en) | 2013-01-11 | 2016-02-16 | Commvault Systems, Inc. | Location-based data synchronization management |
US9804930B2 (en) | 2013-01-11 | 2017-10-31 | Commvault Systems, Inc. | Partial file restore in a data storage system |
US9495404B2 (en) | 2013-01-11 | 2016-11-15 | Commvault Systems, Inc. | Systems and methods to process block-level backup for selective file restoration for virtual machines |
US9483489B2 (en) | 2013-01-14 | 2016-11-01 | Commvault Systems, Inc. | Partial sharing of secondary storage files in a data storage system |
US9286110B2 (en) | 2013-01-14 | 2016-03-15 | Commvault Systems, Inc. | Seamless virtual machine recall in a data storage system |
US9459968B2 (en) | 2013-03-11 | 2016-10-04 | Commvault Systems, Inc. | Single index to query multiple backup formats |
US20140281516A1 (en) | 2013-03-12 | 2014-09-18 | Commvault Systems, Inc. | Automatic file decryption |
US9934103B2 (en) | 2013-04-16 | 2018-04-03 | Commvault Systems, Inc. | Managing multi-source restore operations in an information management system |
US9483361B2 (en) | 2013-05-08 | 2016-11-01 | Commvault Systems, Inc. | Information management cell with failover management capability |
US9483558B2 (en) | 2013-05-29 | 2016-11-01 | Commvault Systems, Inc. | Assessing user performance in a community of users of data storage resources |
US9939981B2 (en) | 2013-09-12 | 2018-04-10 | Commvault Systems, Inc. | File manager integration with virtualization in an information management system with an enhanced storage manager, including user control and storage management of virtual machines |
US9590886B2 (en) | 2013-11-01 | 2017-03-07 | Commvault Systems, Inc. | Systems and methods for differential health checking of an information management system |
US10949382B2 (en) | 2014-01-15 | 2021-03-16 | Commvault Systems, Inc. | User-centric interfaces for information management systems |
US9753812B2 (en) | 2014-01-24 | 2017-09-05 | Commvault Systems, Inc. | Generating mapping information for single snapshot for multiple applications |
US9495251B2 (en) | 2014-01-24 | 2016-11-15 | Commvault Systems, Inc. | Snapshot readiness checking and reporting |
US9632874B2 (en) | 2014-01-24 | 2017-04-25 | Commvault Systems, Inc. | Database application backup in single snapshot for multiple applications |
US9639426B2 (en) | 2014-01-24 | 2017-05-02 | Commvault Systems, Inc. | Single snapshot for multiple applications |
US10324897B2 (en) | 2014-01-27 | 2019-06-18 | Commvault Systems, Inc. | Techniques for serving archived electronic mail |
US9798596B2 (en) | 2014-02-27 | 2017-10-24 | Commvault Systems, Inc. | Automatic alert escalation for an information management system |
US9648100B2 (en) | 2014-03-05 | 2017-05-09 | Commvault Systems, Inc. | Cross-system storage management for transferring data across autonomous information management systems |
US9633026B2 (en) | 2014-03-13 | 2017-04-25 | Commvault Systems, Inc. | Systems and methods for protecting email data |
US9633056B2 (en) | 2014-03-17 | 2017-04-25 | Commvault Systems, Inc. | Maintaining a deduplication database |
US10380072B2 (en) | 2014-03-17 | 2019-08-13 | Commvault Systems, Inc. | Managing deletions from a deduplication database |
US9811427B2 (en) | 2014-04-02 | 2017-11-07 | Commvault Systems, Inc. | Information management by a media agent in the absence of communications with a storage manager |
US9823978B2 (en) | 2014-04-16 | 2017-11-21 | Commvault Systems, Inc. | User-level quota management of data objects stored in information management systems |
US9740574B2 (en) | 2014-05-09 | 2017-08-22 | Commvault Systems, Inc. | Load balancing across multiple data paths |
US9848045B2 (en) | 2014-05-27 | 2017-12-19 | Commvault Systems, Inc. | Offline messaging between a repository storage operation cell and remote storage operation cells via an intermediary media agent |
US9760446B2 (en) | 2014-06-11 | 2017-09-12 | Micron Technology, Inc. | Conveying value of implementing an integrated data management and protection system |
US20160004605A1 (en) | 2014-07-01 | 2016-01-07 | Commvault Systems, Inc. | Lightweight data reconstruction based on backup data |
US20160019317A1 (en) | 2014-07-16 | 2016-01-21 | Commvault Systems, Inc. | Volume or virtual machine level backup and generating placeholders for virtual machine files |
US20160019117A1 (en) | 2014-07-16 | 2016-01-21 | Commvault Systems, Inc. | Creating customized bootable image for client computing device from backup copy |
US20160019224A1 (en) | 2014-07-18 | 2016-01-21 | Commvault Systems, Inc. | File system content archiving based on third-party application archiving rules and metadata |
US9641388B2 (en) | 2014-07-29 | 2017-05-02 | Commvault Systems, Inc. | Customized deployment in information management systems |
US10031917B2 (en) | 2014-07-29 | 2018-07-24 | Commvault Systems, Inc. | Efficient volume-level replication of data via snapshots in an information management system |
US11249858B2 (en) | 2014-08-06 | 2022-02-15 | Commvault Systems, Inc. | Point-in-time backups of a production application made accessible over fibre channel and/or ISCSI as data sources to a remote application by representing the backups as pseudo-disks operating apart from the production application and its host |
US9852026B2 (en) | 2014-08-06 | 2017-12-26 | Commvault Systems, Inc. | Efficient application recovery in an information management system based on a pseudo-storage-device driver |
US10360110B2 (en) | 2014-08-06 | 2019-07-23 | Commvault Systems, Inc. | Point-in-time backups of a production application made accessible over fibre channel and/or iSCSI as data sources to a remote application by representing the backups as pseudo-disks operating apart from the production application and its host |
US10042716B2 (en) | 2014-09-03 | 2018-08-07 | Commvault Systems, Inc. | Consolidated processing of storage-array commands using a forwarder media agent in conjunction with a snapshot-control media agent |
US9774672B2 (en) | 2014-09-03 | 2017-09-26 | Commvault Systems, Inc. | Consolidated processing of storage-array commands by a snapshot-control media agent |
US9405928B2 (en) | 2014-09-17 | 2016-08-02 | Commvault Systems, Inc. | Deriving encryption rules based on file content |
US9710465B2 (en) | 2014-09-22 | 2017-07-18 | Commvault Systems, Inc. | Efficiently restoring execution of a backed up virtual machine based on coordination with virtual-machine-file-relocation operations |
US9417968B2 (en) | 2014-09-22 | 2016-08-16 | Commvault Systems, Inc. | Efficiently restoring execution of a backed up virtual machine based on coordination with virtual-machine-file-relocation operations |
US9436555B2 (en) | 2014-09-22 | 2016-09-06 | Commvault Systems, Inc. | Efficient live-mount of a backed up virtual machine in a storage management system |
US10204010B2 (en) | 2014-10-03 | 2019-02-12 | Commvault Systems, Inc. | Intelligent protection of off-line mail data |
US9609058B2 (en) | 2014-10-13 | 2017-03-28 | Commvault Systems, Inc. | Storage management operations based on executable files served on demand to storage management components |
US9444811B2 (en) | 2014-10-21 | 2016-09-13 | Commvault Systems, Inc. | Using an enhanced data agent to restore backed up data across autonomous storage management systems |
US9575673B2 (en) | 2014-10-29 | 2017-02-21 | Commvault Systems, Inc. | Accessing a file system using tiered deduplication |
US10776209B2 (en) | 2014-11-10 | 2020-09-15 | Commvault Systems, Inc. | Cross-platform virtual machine backup and replication |
US9848046B2 (en) | 2014-11-13 | 2017-12-19 | Commvault Systems, Inc. | Archiving applications in information management systems |
US9648105B2 (en) | 2014-11-14 | 2017-05-09 | Commvault Systems, Inc. | Unified snapshot storage management, using an enhanced storage manager and enhanced media agents |
US9448731B2 (en) | 2014-11-14 | 2016-09-20 | Commvault Systems, Inc. | Unified snapshot storage management |
US20160142485A1 (en) | 2014-11-19 | 2016-05-19 | Commvault Systems, Inc. | Migration to cloud storage from backup |
US9983936B2 (en) | 2014-11-20 | 2018-05-29 | Commvault Systems, Inc. | Virtual machine change block tracking |
US20160162364A1 (en) | 2014-12-03 | 2016-06-09 | Commvault Systems, Inc. | Secondary storage pruning |
US9632713B2 (en) | 2014-12-03 | 2017-04-25 | Commvault Systems, Inc. | Secondary storage editor |
US9645891B2 (en) | 2014-12-04 | 2017-05-09 | Commvault Systems, Inc. | Opportunistic execution of secondary copy operations |
US9753816B2 (en) | 2014-12-05 | 2017-09-05 | Commvault Systems, Inc. | Synchronization based on filtered browsing |
US20160210044A1 (en) | 2015-01-15 | 2016-07-21 | Commvault Systems, Inc. | Intelligent hybrid drive caching |
US20160210306A1 (en) | 2015-01-15 | 2016-07-21 | Commvault Systems, Inc. | Managing structured data in a data storage system |
US9588849B2 (en) | 2015-01-20 | 2017-03-07 | Commvault Systems, Inc. | Synchronizing selected portions of data in a storage management system |
US9952934B2 (en) | 2015-01-20 | 2018-04-24 | Commvault Systems, Inc. | Synchronizing selected portions of data in a storage management system |
US10108687B2 (en) | 2015-01-21 | 2018-10-23 | Commvault Systems, Inc. | Database protection using block-level mapping |
US9904481B2 (en) | 2015-01-23 | 2018-02-27 | Commvault Systems, Inc. | Scalable auxiliary copy processing in a storage management system using media agent resources |
US9898213B2 (en) | 2015-01-23 | 2018-02-20 | Commvault Systems, Inc. | Scalable auxiliary copy processing using media agent resources |
US10313243B2 (en) | 2015-02-24 | 2019-06-04 | Commvault Systems, Inc. | Intelligent local management of data stream throttling in secondary-copy operations |
US10956299B2 (en) | 2015-02-27 | 2021-03-23 | Commvault Systems, Inc. | Diagnosing errors in data storage and archiving in a cloud or networking environment |
US9575804B2 (en) | 2015-03-27 | 2017-02-21 | Commvault Systems, Inc. | Job management and resource allocation |
US9928144B2 (en) | 2015-03-30 | 2018-03-27 | Commvault Systems, Inc. | Storage management of data using an open-archive architecture, including streamlined access to primary data originally stored on network-attached storage and archived to secondary storage |
US9934265B2 (en) | 2015-04-09 | 2018-04-03 | Commvault Systems, Inc. | Management of log data |
US10339106B2 (en) | 2015-04-09 | 2019-07-02 | Commvault Systems, Inc. | Highly reusable deduplication database after disaster recovery |
US10311150B2 (en) | 2015-04-10 | 2019-06-04 | Commvault Systems, Inc. | Using a Unix-based file system to manage and serve clones to windows-based computing clients |
US9710253B2 (en) | 2015-04-16 | 2017-07-18 | Commvault Systems, Inc. | Managing a software-patch submission queue |
US9904598B2 (en) | 2015-04-21 | 2018-02-27 | Commvault Systems, Inc. | Content-independent and database management system-independent synthetic full backup of a database based on snapshot technology |
US9639286B2 (en) | 2015-05-14 | 2017-05-02 | Commvault Systems, Inc. | Restore of secondary data using thread pooling |
US10324914B2 (en) | 2015-05-20 | 2019-06-18 | Commvalut Systems, Inc. | Handling user queries against production and archive storage systems, such as for enterprise customers having large and/or numerous files |
US20160350391A1 (en) | 2015-05-26 | 2016-12-01 | Commvault Systems, Inc. | Replication using deduplicated secondary copy data |
US9563514B2 (en) | 2015-06-19 | 2017-02-07 | Commvault Systems, Inc. | Assignment of proxies for virtual-machine secondary copy operations including streaming backup jobs |
US10084873B2 (en) | 2015-06-19 | 2018-09-25 | Commvault Systems, Inc. | Assignment of data agent proxies for executing virtual-machine secondary copy operations including streaming backup jobs |
US10275320B2 (en) | 2015-06-26 | 2019-04-30 | Commvault Systems, Inc. | Incrementally accumulating in-process performance data and hierarchical reporting thereof for a data stream in a secondary copy operation |
US9766825B2 (en) | 2015-07-22 | 2017-09-19 | Commvault Systems, Inc. | Browse and restore for block-level backups |
US10192065B2 (en) | 2015-08-31 | 2019-01-29 | Commvault Systems, Inc. | Automated intelligent provisioning of data storage resources in response to user requests in a data storage management system |
US10101913B2 (en) | 2015-09-02 | 2018-10-16 | Commvault Systems, Inc. | Migrating data to disk without interrupting running backup operations |
EP3350728B1 (en) | 2015-09-18 | 2022-04-06 | Commvault Systems, Inc. | Data storage management operations in a secondary storage subsystem using image recognition and image-based criteria |
US10514986B2 (en) | 2015-09-30 | 2019-12-24 | Commvault Systems, Inc. | Dynamic triggering of block-level backups based on block change thresholds and corresponding file identities in a data storage management system |
US10176036B2 (en) | 2015-10-29 | 2019-01-08 | Commvault Systems, Inc. | Monitoring, diagnosing, and repairing a management database in a data storage management system |
US10353994B2 (en) | 2015-11-03 | 2019-07-16 | Commvault Systems, Inc. | Summarization of email on a client computing device based on content contribution to an email thread using classification and word frequency considerations |
US10228962B2 (en) | 2015-12-09 | 2019-03-12 | Commvault Systems, Inc. | Live synchronization and management of virtual machines across computing and virtualization platforms and using live synchronization to support disaster recovery |
US10387266B2 (en) | 2015-12-23 | 2019-08-20 | Commvault Systems, Inc. | Application-level live synchronization across computing platforms including synchronizing co-resident applications to disparate standby destinations and selectively synchronizing some applications and not others |
US20170192868A1 (en) | 2015-12-30 | 2017-07-06 | Commvault Systems, Inc. | User interface for identifying a location of a failed secondary storage device |
US10684924B2 (en) | 2016-02-18 | 2020-06-16 | Commvault Systems, Inc. | Data restoration operations based on network path information |
US10452490B2 (en) | 2016-03-09 | 2019-10-22 | Commvault Systems, Inc. | Data management and backup of distributed storage environment |
US10592350B2 (en) | 2016-03-09 | 2020-03-17 | Commvault Systems, Inc. | Virtual server cloud file system for virtual machine restore to cloud operations |
US10296368B2 (en) | 2016-03-09 | 2019-05-21 | Commvault Systems, Inc. | Hypervisor-independent block-level live browse for access to backed up virtual machine (VM) data and hypervisor-free file-level recovery (block-level pseudo-mount) |
US10503753B2 (en) | 2016-03-10 | 2019-12-10 | Commvault Systems, Inc. | Snapshot replication operations based on incremental block change tracking |
US10248174B2 (en) | 2016-05-24 | 2019-04-02 | Hedvig, Inc. | Persistent reservations for virtual disk using multiple targets |
US10664447B2 (en) | 2016-07-12 | 2020-05-26 | Commvault Systems, Inc. | Dynamic management of expandable cache storage for multiple network shares configured in a file server |
US10417102B2 (en) | 2016-09-30 | 2019-09-17 | Commvault Systems, Inc. | Heartbeat monitoring of virtual machines for initiating failover operations in a data storage management system, including virtual machine distribution logic |
US10540516B2 (en) | 2016-10-13 | 2020-01-21 | Commvault Systems, Inc. | Data protection within an unsecured storage environment |
US10210048B2 (en) | 2016-10-25 | 2019-02-19 | Commvault Systems, Inc. | Selective snapshot and backup copy operations for individual virtual machines in a shared storage |
US10162528B2 (en) | 2016-10-25 | 2018-12-25 | Commvault Systems, Inc. | Targeted snapshot based on virtual machine location |
US10152251B2 (en) | 2016-10-25 | 2018-12-11 | Commvault Systems, Inc. | Targeted backup of virtual machine |
US10389810B2 (en) | 2016-11-02 | 2019-08-20 | Commvault Systems, Inc. | Multi-threaded scanning of distributed file systems |
US10922189B2 (en) | 2016-11-02 | 2021-02-16 | Commvault Systems, Inc. | Historical network data-based scanning thread generation |
US11106632B2 (en) | 2016-11-16 | 2021-08-31 | Commvault Systems, Inc. | Dynamically configuring a proxy server using containerization for concurrent and/or overlapping backup, restore, and/or test operations |
US10678758B2 (en) | 2016-11-21 | 2020-06-09 | Commvault Systems, Inc. | Cross-platform virtual machine data and memory backup and replication |
US10838821B2 (en) | 2017-02-08 | 2020-11-17 | Commvault Systems, Inc. | Migrating content and metadata from a backup system |
US10740193B2 (en) | 2017-02-27 | 2020-08-11 | Commvault Systems, Inc. | Hypervisor-independent reference copies of virtual machine payload data based on block-level pseudo-mount |
US10459666B2 (en) | 2017-03-03 | 2019-10-29 | Commvault Systems, Inc. | Using storage managers in respective data storage management systems for license distribution, compliance, and updates |
US11032350B2 (en) | 2017-03-15 | 2021-06-08 | Commvault Systems, Inc. | Remote commands framework to control clients |
US10949308B2 (en) | 2017-03-15 | 2021-03-16 | Commvault Systems, Inc. | Application aware backup of virtual machines |
US10877851B2 (en) | 2017-03-24 | 2020-12-29 | Commvault Systems, Inc. | Virtual machine recovery point selection |
US10891069B2 (en) | 2017-03-27 | 2021-01-12 | Commvault Systems, Inc. | Creating local copies of data stored in online data repositories |
US10613939B2 (en) | 2017-03-28 | 2020-04-07 | Commvault Systems, Inc. | Backup index generation process |
US10776329B2 (en) | 2017-03-28 | 2020-09-15 | Commvault Systems, Inc. | Migration of a database management system to cloud storage |
US11108858B2 (en) | 2017-03-28 | 2021-08-31 | Commvault Systems, Inc. | Archiving mail servers via a simple mail transfer protocol (SMTP) server |
US10387073B2 (en) | 2017-03-29 | 2019-08-20 | Commvault Systems, Inc. | External dynamic virtual machine synchronization |
US11074140B2 (en) | 2017-03-29 | 2021-07-27 | Commvault Systems, Inc. | Live browsing of granular mailbox data |
US10949398B2 (en) | 2017-03-29 | 2021-03-16 | Commvault Systems, Inc. | Synchronization operations for network-accessible folders |
US11074138B2 (en) | 2017-03-29 | 2021-07-27 | Commvault Systems, Inc. | Multi-streaming backup operations for mailboxes |
US10599527B2 (en) | 2017-03-29 | 2020-03-24 | Commvault Systems, Inc. | Information management cell health monitoring system |
US11294786B2 (en) | 2017-03-31 | 2022-04-05 | Commvault Systems, Inc. | Management of internet of things devices |
US10853195B2 (en) | 2017-03-31 | 2020-12-01 | Commvault Systems, Inc. | Granular restoration of virtual machine application data |
US10552294B2 (en) | 2017-03-31 | 2020-02-04 | Commvault Systems, Inc. | Management of internet of things devices |
US11010261B2 (en) | 2017-03-31 | 2021-05-18 | Commvault Systems, Inc. | Dynamically allocating streams during restoration of data |
US11221939B2 (en) | 2017-03-31 | 2022-01-11 | Commvault Systems, Inc. | Managing data from internet of things devices in a vehicle |
US10984041B2 (en) | 2017-05-11 | 2021-04-20 | Commvault Systems, Inc. | Natural language processing integrated with database and data storage management |
US10664352B2 (en) | 2017-06-14 | 2020-05-26 | Commvault Systems, Inc. | Live browsing of backed up data residing on cloned disks |
US11263088B2 (en) | 2017-09-14 | 2022-03-01 | Commvault Systems, Inc. | Distributed architecture for tracking content indexing |
US10846180B2 (en) | 2017-09-14 | 2020-11-24 | Commvault Systems, Inc. | Distributed framework for task splitting and task assignments in a content indexing system |
US11036592B2 (en) | 2017-09-14 | 2021-06-15 | Commvault Systems, Inc. | Distributed content indexing architecture with separately stored file previews |
US10846266B2 (en) | 2017-09-14 | 2020-11-24 | Commvault Systems, Inc. | Distributed architecture for content indexing emails |
US11086834B2 (en) | 2017-09-14 | 2021-08-10 | Commvault Systems, Inc. | Distributed framework for data proximity-based task splitting in a content indexing system |
US10740300B1 (en) | 2017-12-07 | 2020-08-11 | Commvault Systems, Inc. | Synchronization of metadata in a distributed storage system |
US10635546B2 (en) | 2017-12-07 | 2020-04-28 | Commvault Systems, Inc. | Synthesizing a restore image from one or more secondary copies to facilitate data restore operations to a file server |
US10742735B2 (en) | 2017-12-12 | 2020-08-11 | Commvault Systems, Inc. | Enhanced network attached storage (NAS) services interfacing to cloud storage |
US10831591B2 (en) | 2018-01-11 | 2020-11-10 | Commvault Systems, Inc. | Remedial action based on maintaining process awareness in data storage management |
US10795927B2 (en) | 2018-02-05 | 2020-10-06 | Commvault Systems, Inc. | On-demand metadata extraction of clinical image data |
US10732885B2 (en) | 2018-02-14 | 2020-08-04 | Commvault Systems, Inc. | Block-level live browsing and private writable snapshots using an ISCSI server |
US10592145B2 (en) | 2018-02-14 | 2020-03-17 | Commvault Systems, Inc. | Machine learning-based data object storage |
US10642886B2 (en) | 2018-02-14 | 2020-05-05 | Commvault Systems, Inc. | Targeted search of backup data using facial recognition |
US10848468B1 (en) | 2018-03-05 | 2020-11-24 | Commvault Systems, Inc. | In-flight data encryption/decryption for a distributed storage platform |
US10877928B2 (en) | 2018-03-07 | 2020-12-29 | Commvault Systems, Inc. | Using utilities injected into cloud-based virtual machines for speeding up virtual machine backup operations |
US10761942B2 (en) | 2018-03-12 | 2020-09-01 | Commvault Systems, Inc. | Recovery point objective (RPO) driven backup scheduling in a data storage management system using an enhanced data agent |
US10789387B2 (en) | 2018-03-13 | 2020-09-29 | Commvault Systems, Inc. | Graphical representation of an information management system |
US11249863B2 (en) | 2018-05-02 | 2022-02-15 | Commvault Systems, Inc. | Backup-based media agent configuration |
US11321183B2 (en) | 2018-05-02 | 2022-05-03 | Commvault Systems, Inc. | Multi-tiered backup indexing |
US10673943B2 (en) | 2018-05-02 | 2020-06-02 | Commvault Systems, Inc. | Network storage backup using distributed media agents |
US10893103B2 (en) | 2018-07-25 | 2021-01-12 | Commvault Systems, Inc. | Distributed and scalable storage management using a storage-microservices server |
US10891304B2 (en) | 2018-07-25 | 2021-01-12 | Commvault Systems, Inc. | Distributed and scalable client-based storage management |
US10891198B2 (en) | 2018-07-30 | 2021-01-12 | Commvault Systems, Inc. | Storing data to cloud libraries in cloud native formats |
US11159469B2 (en) | 2018-09-12 | 2021-10-26 | Commvault Systems, Inc. | Using machine learning to modify presentation of mailbox objects |
US11016696B2 (en) | 2018-09-14 | 2021-05-25 | Commvault Systems, Inc. | Redundant distributed data storage system |
US11010258B2 (en) | 2018-11-27 | 2021-05-18 | Commvault Systems, Inc. | Generating backup copies through interoperability between components of a data storage management system and appliances for data storage and deduplication |
US11200124B2 (en) | 2018-12-06 | 2021-12-14 | Commvault Systems, Inc. | Assigning backup resources based on failover of partnered data storage servers in a data storage management system |
US10860443B2 (en) | 2018-12-10 | 2020-12-08 | Commvault Systems, Inc. | Evaluation and reporting of recovery readiness in a data storage management system |
US20200192572A1 (en) | 2018-12-14 | 2020-06-18 | Commvault Systems, Inc. | Disk usage growth prediction system |
US11012508B2 (en) | 2018-12-14 | 2021-05-18 | Commvault Systems, Inc. | Region-based distributed information management system |
US11698727B2 (en) | 2018-12-14 | 2023-07-11 | Commvault Systems, Inc. | Performing secondary copy operations based on deduplication performance |
US10872069B2 (en) | 2019-01-22 | 2020-12-22 | Commvault Systems, Inc. | File indexing for virtual machine backups in a data storage management system |
US11347707B2 (en) | 2019-01-22 | 2022-05-31 | Commvault Systems, Inc. | File indexing for virtual machine backups based on using live browse features |
US10768971B2 (en) | 2019-01-30 | 2020-09-08 | Commvault Systems, Inc. | Cross-hypervisor live mount of backed up virtual machine data |
US10996974B2 (en) | 2019-01-30 | 2021-05-04 | Commvault Systems, Inc. | Cross-hypervisor live mount of backed up virtual machine data, including management of cache storage for virtual machine data |
US11126365B2 (en) | 2019-03-11 | 2021-09-21 | Commvault Systems, Inc. | Skipping data backed up in prior backup operations |
US11269732B2 (en) | 2019-03-12 | 2022-03-08 | Commvault Systems, Inc. | Managing structured data in a data storage system |
US11321184B2 (en) | 2019-03-26 | 2022-05-03 | Commvault Systems, Inc. | Streamlined secondary copy operations for data stored on shared file storage |
US20200327017A1 (en) | 2019-04-10 | 2020-10-15 | Commvault Systems, Inc. | Restore using deduplicated secondary copy data |
US11100064B2 (en) | 2019-04-30 | 2021-08-24 | Commvault Systems, Inc. | Automated log-based remediation of an information management system |
US11366723B2 (en) | 2019-04-30 | 2022-06-21 | Commvault Systems, Inc. | Data storage management system for holistic protection and migration of serverless applications across multi-cloud computing environments |
US11442623B2 (en) | 2019-05-02 | 2022-09-13 | Commvault Systems, Inc. | Faster browse of secondary copies of block-level data volumes |
US11463264B2 (en) | 2019-05-08 | 2022-10-04 | Commvault Systems, Inc. | Use of data block signatures for monitoring in an information management system |
US11269734B2 (en) | 2019-06-17 | 2022-03-08 | Commvault Systems, Inc. | Data storage management system for multi-cloud protection, recovery, and migration of databases-as-a-service and/or serverless database management systems |
US11308034B2 (en) | 2019-06-27 | 2022-04-19 | Commvault Systems, Inc. | Continuously run log backup with minimal configuration and resource usage from the source machine |
US11561866B2 (en) | 2019-07-10 | 2023-01-24 | Commvault Systems, Inc. | Preparing containerized applications for backup using a backup services container and a backup services container-orchestration pod |
US11042318B2 (en) | 2019-07-29 | 2021-06-22 | Commvault Systems, Inc. | Block-level data replication |
US20210037112A1 (en) | 2019-07-29 | 2021-02-04 | Commvault Systems, Inc. | Data storage system with rapid restore capability |
US11263173B2 (en) | 2019-07-30 | 2022-03-01 | Commvault Systems, Inc. | Transaction log index generation in an enterprise backup system |
US11513922B2 (en) | 2019-08-14 | 2022-11-29 | Commvault Systems, Inc. | Systems and methods for change block tracking for backing up changed data |
US11237935B2 (en) | 2019-09-11 | 2022-02-01 | Commvault Systems, Inc. | Anomaly detection in data protection operations |
US11256673B2 (en) | 2019-09-11 | 2022-02-22 | Commvault Systems, Inc. | Anomaly detection in deduplication pruning operations |
US11218450B2 (en) | 2019-09-11 | 2022-01-04 | Commvault Systems, Inc. | Data protection component scaling in a cloud-based data storage system |
US20210133150A1 (en) | 2019-11-04 | 2021-05-06 | Commvault Systems, Inc. | Efficient implementation of multiple deduplication databases in a heterogeneous data storage system |
US11442896B2 (en) | 2019-12-04 | 2022-09-13 | Commvault Systems, Inc. | Systems and methods for optimizing restoration of deduplicated data stored in cloud-based storage resources |
US11237924B2 (en) | 2019-12-11 | 2022-02-01 | Commvault Systems, Inc. | Dynamic resizing and re-distribution of destination data storage resources for bare metal restore operations in a data storage management system |
US11223535B2 (en) | 2019-12-31 | 2022-01-11 | Commvault Systems, Inc. | Smart network topology systems and methods |
US11467753B2 (en) | 2020-02-14 | 2022-10-11 | Commvault Systems, Inc. | On-demand restore of virtual machine data |
US11422900B2 (en) | 2020-03-02 | 2022-08-23 | Commvault Systems, Inc. | Platform-agnostic containerized application data protection |
US11321188B2 (en) | 2020-03-02 | 2022-05-03 | Commvault Systems, Inc. | Platform-agnostic containerized application data protection |
US11005935B1 (en) | 2020-03-10 | 2021-05-11 | Commvault Systems, Inc. | Using multiple streams with network data management protocol to improve performance and granularity of backup and restore operations from/to a file server |
US11334442B2 (en) | 2020-03-10 | 2022-05-17 | Commvault Systems, Inc. | Management database long-term archiving to a recovery manager |
US11442768B2 (en) | 2020-03-12 | 2022-09-13 | Commvault Systems, Inc. | Cross-hypervisor live recovery of virtual machines |
US11099956B1 (en) | 2020-03-26 | 2021-08-24 | Commvault Systems, Inc. | Snapshot-based disaster recovery orchestration of virtual machine failover and failback operations |
US11500669B2 (en) | 2020-05-15 | 2022-11-15 | Commvault Systems, Inc. | Live recovery of virtual machines in a public cloud computing environment |
US11687424B2 (en) | 2020-05-28 | 2023-06-27 | Commvault Systems, Inc. | Automated media agent state management |
US11327663B2 (en) | 2020-06-09 | 2022-05-10 | Commvault Systems, Inc. | Ensuring the integrity of data storage volumes used in block-level live synchronization operations in a data storage management system |
US11537959B2 (en) | 2020-06-16 | 2022-12-27 | Commvault Systems, Inc. | Dynamic computing progress tracker |
US11614883B2 (en) | 2020-07-17 | 2023-03-28 | Commvault Systems, Inc. | Distributed data storage system using erasure coding on storage nodes fewer than data plus parity fragments |
US11494417B2 (en) | 2020-08-07 | 2022-11-08 | Commvault Systems, Inc. | Automated email classification in an information management system |
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Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3588839A (en) * | 1969-01-15 | 1971-06-28 | Ibm | Hierarchical memory updating system |
JPS5633915B1 (en) * | 1970-11-06 | 1981-08-06 | ||
US3905023A (en) * | 1973-08-15 | 1975-09-09 | Burroughs Corp | Large scale multi-level information processing system employing improved failsaft techniques |
US3889237A (en) * | 1973-11-16 | 1975-06-10 | Sperry Rand Corp | Common storage controller for dual processor system |
US4084231A (en) * | 1975-12-18 | 1978-04-11 | International Business Machines Corporation | System for facilitating the copying back of data in disc and tape units of a memory hierarchial system |
US4077059A (en) * | 1975-12-18 | 1978-02-28 | Cordi Vincent A | Multi-processing system with a hierarchial memory having journaling and copyback |
US4044337A (en) * | 1975-12-23 | 1977-08-23 | International Business Machines Corporation | Instruction retry mechanism for a data processing system |
US4084233A (en) * | 1976-05-25 | 1978-04-11 | Honeywell, Inc. | Microcomputer apparatus |
US4399506A (en) * | 1980-10-06 | 1983-08-16 | International Business Machines Corporation | Store-in-cache processor means for clearing main storage |
US4394733A (en) * | 1980-11-14 | 1983-07-19 | Sperry Corporation | Cache/disk subsystem |
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1984
- 1984-07-26 US US06/634,460 patent/US4686620A/en not_active Expired - Lifetime
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1985
- 1985-07-03 KR KR1019860700170A patent/KR930008684B1/en not_active IP Right Cessation
- 1985-07-03 WO PCT/US1985/001279 patent/WO1986001018A1/en active IP Right Grant
- 1985-07-03 JP JP60503226A patent/JPH061447B2/en not_active Expired - Lifetime
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- 1985-07-03 EP EP85903605A patent/EP0191036B1/en not_active Expired - Lifetime
- 1985-07-25 CA CA000487514A patent/CA1237201A/en not_active Expired
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KR930008684B1 (en) | 1993-09-11 |
US4686620A (en) | 1987-08-11 |
JPS61502846A (en) | 1986-12-04 |
WO1986001018A1 (en) | 1986-02-13 |
DE3577935D1 (en) | 1990-06-28 |
KR860700301A (en) | 1986-08-01 |
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