Pure Storage, Inc.
Data replication within a flash storage array

Abstract:

A system and method for performing replication using mediums. A snapshot `S` is selected for replication, and the anchor medium `M` of S is identified. The replica storage array `R` to which M is being replicated determines a list of medium extents which are available. R sends this list to an original storage array `O` and O generates a list of medium extents which need to be sent to R. Only those medium extents corresponding to M which R does not already have will be sent from O to R. Also, R can obtain medium extents from other source storage arrays during the replication process.