| 摘要 |
<p>In the conventional technique, consistency is ensured only for writing from a single storage. Asynchronous remote copying and local replication are also alternately suspended in the conventional technique, so suspension time increases and the volume in which consistency is obtained becomes old. Two local replicas are prepared for a volume containing stored (*9) data that are transferred from the main site (101) by asynchronous remote copying in the storage at the sub-site (102), each pair of local replicas is alternately suspended by a time-specific suspension command according to the time of the timestamp attached to the write data, replica data in which the time sequence is secured are continually prepared, and when a failure occurs at the main site (101), the data are recovered using the replica.</p> |
