Patent ID: 9009431
Filing Date: 2015-04-14
Classification: G06F

Abstract:
1. A method of snapshot data replication between a plurality of data storage sites, the method comprising: at a first data storage site, generating, at spaced time intervals, a plurality of snapshots for a logical data volume of the first data storage site, the logical data volume being an abstraction of data blocks from one or more physical storage devices; and at a second data storage site, for each of the plurality of snapshots generated at the first data storage site, creating a virtual snapshot, accessible to local users of the second data storage site until the corresponding snapshot from the first data storage site is replicated to the second data storage site, the virtual snapshot directing the user to the corresponding snapshot stored at the first data storage site, but giving the appearance to the user that data of the corresponding snapshot is stored locally at the second data storage site.