| 摘要 |
PROBLEM TO BE SOLVED: To provide a consistency method and a consistency system of a desired level in a larger, more complicated, and highly distributed system. SOLUTION: An independent quorum system is used to maintain data consistency during migration operation and reconfiguration operation. The current configuration is first determined to be reconfigured. A new configuration is then initialized, and data blocks are copied from the current configuration to the new configuration. Then, the configuration states maintained by component data storage systems that store data blocks of the current configuration and the new configuration are synchronized. Finally, the current configuration is deallocated. COPYRIGHT: (C)2007,JPO&INPIT
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