Patent ID: 8286030
Filing Date: 2012-10-09
Classification: G06F

Abstract:
1. A computer-implemented method for providing assisted asynchronous replication between a first storage server having a first current state and a second storage server having a second current state, the computer-implemented method comprising computer-implemented operations for: receiving an instruction to roll back the first storage server from the first current state to a previous state according to a previous snapshot; in response to receiving the instruction, rolling back the first storage server from the first current state to the previous state according to the previous snapshot; determining whether the previous snapshot is available on the second storage server; in response to determining that the previous snapshot is unavailable on the second storage server, retrieving assistance data; identifying a last consistency point common to the first storage server and the second storage server based on the assistance data, the last consistency point at or prior to the previous snapshot; and rolling back the second storage server from the second current state to the last consistency point.