| 摘要 |
<p>A database system includes a center server (101) and local servers (102a, 102b). The center server includes a replication requesting unit (110), a data consolidating unit (3) including a center DB freeze requesting unit and a center DB freeze release requesting unit, a replication source managing table (2) and a data consolidation completion notifying unit (112). Each of the local servers (102a, 102b) includes a local DB freeze requesting unit (121a, 121b), a remote volume split requesting unit (122a, 122b), a remote volume split completion notifying unit (123a, 123b) and a local DB freeze release requesting unit (124a, 124b). The center server permits replications of local DB's (134a, 134b) in local storage subsystems (104a, 104b) to be created in the center storage subsystem (103) and accesses shadow images (131a, 131b) of the replications to give a consolidated access to the plurality of local DB's (102a, 102b).</p> |
