Patent ID: 8918672
Filing Date: 2014-12-23
Classification: G06F,H04L

Abstract:
1. A computer program product comprising a non-transitory computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a storage system controller associated with a second site in a replication pair comprising a first site and the second site, causes the storage system controller to: determine whether a first site computing device has sent a notification of a failure condition of a first site; in response to a determination that the notification of the failure condition of the first site has not been received, permitting local workloads of a second site computing device to access storage volumes on the secondary storage system; and in response to a determination that the notification of the failure condition of the first site has been received, modifying a mode of operation of the second site from a normal mode of operation to a failure mode of operation, wherein in the failure mode of operation, the storage system controller blocks at least a portion of requests from local workloads of the second site computing device to the secondary storage system.