Patent ID: 8762344
Filing Date: 2014-06-24
Classification: G06F,H04L

Abstract:
1. A method for managing an information processing system comprising first and second sub-computer systems and a data management computer system coupled with the first and second sub-computer systems, the first sub-computer systems comprising a first storage subsystems to provide data to client computers, the second sub-computer system comprising a second storage subsystem to provide data to client computers, the data management computer system comprising a third storage subsystem, wherein the data management computer system manages the data shifted from each of the first and second sub-computer systems, the method comprising: the data management computer system storing backup data for the first sub-computer system in the third storage subsystem and the data management computer system managing data sharing setting information for each file or directory, wherein the data sharing setting information includes (i) update frequency information, as scheduling information on restore processing of the backup data, indicative of timing at which a data sharing file system in the second sub-computer system is updated by re-restoration, for each file or directory, (ii) reference information indicative of whether the second sub-computer system references the backup data for each file or directory, (iii) cache maintenance period information indicative of a period from conversion into a file of stub data accessed by a client computer until the file is re-stubbed, for each file or directory and (iv) access user information indicative of who can set and modify data sharing information for each file or directory, wherein, if data stored in the storage subsystem of the first sub-computer system is changed, the data management computer system keeps original backup data before changed corresponding to the changed data in the third storage subsystem until data migration process from the first sub-computer system to the data management computer system is executed and reflects the change in the data in the original backup data when the data migration process is executed, wherein the second sub-computer system references the original backup data before changed in the third storage subsystem via stub data until next restore process is executed in accordance with the scheduling, and wherein the original backup data is deleted from the third storage sub system when a given period has elapsed.