Patent ID: 7925626
Filing Date: 2011-04-12
Classification: G06F,H04L

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 an immediate copy target site, the source copy complete message being indicative of the source copy site having a complete copy of the volume data, wherein the source copy site is designated by the mount site for storing a primary copy of the volume data; wherein the immediate 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 the source copy complete message, wherein the immediate copy target site pulls the volume data from the determined peer distributed storage site having the complete copy of the volume data, and wherein the immediate copy target site pulls and stores the volume data prior to a complete execution of the host job: wherein the immediate copy target site is further operable to communicate an immediate copy complete message to the mount site, the immediate copy complete message being indicative of the immediate copy target site having the complete copy of the volume data; and wherein the mount site is further operable to indicate a redundancy status of the composite storage server as having an adequate redundancy based on the mount site receiving the immediate copy complete message from the immediate copy target site prior to an expiration of a redundancy copy timer.