Patent ID: 8019723
Filing Date: 2011-09-13
Classification: G06F

Abstract:
1. A composite storage server, comprising: a plurality of interconnected peer distributed storage sites including a mount site, a source copy site and at least one copy target site for executing a host job involving a storage of volume data within the composite storage server; wherein the mount site is operable to communicate a source copy complete message to a deferred copy target site, the source storage complete message being indicative of the source copy site having a complete copy of the volume data; wherein the mount site is further operable to transition the host job from an active status to an inactive status in response to determining that an adequate redundancy of copies of the volume data at the copy target sites is achieved prior to expiration of a redundancy timer and subsequent to communicating the source copy complete message to the deferred copy target site; wherein, in response to receiving the source copy complete message, the deferred copy target site determines whether the host job has the inactive status as set by the mount site; wherein the deferred copy target site queries the peer distributed storage sites to determine one of the peer distributed storage sites having the complete copy of the volume data to pull in response to determining that the host job has the inactive status; and wherein, in response to determining that the host job has the inactive status, the deferred copy target site pulls the volume data from the determined peer distributed storage site having the complete copy of the volume data.