The invention provides a node apparatus and a storage apparatus for use with a distributed system and a recovery method for a resource managing server for a distributed system, which are improved in that the load to a server upon recovery of the server is reduced and the memory area of the server...http://www.google.de/patents/US5845082?utm_source=gb-gplus-sharePatent US5845082 - Distributed system having an improved method and apparatus for checkpoint taking 
