公开(公告)号：US09235481B1

公开(公告)日：2016-01-12

申请号：US14706104

申请日：2015-05-07

Applicant: EMC Corporation

Inventor： Assaf Natanzon ,  Saar Cohen ,  Steven R Bromling

IPC: G06F12/08 ,  G06F11/34 ,  G06F1/24 ,  G06F11/16 ,  G06F17/30 ,  G06F11/07

CPC classification number: G06F11/1695 ,  G06F1/24 ,  G06F11/00 ,  G06F11/073 ,  G06F11/14 ,  G06F17/30368 ,  G06F17/30578 ,  G06F17/30864 ,  G06F2201/80

Abstract: In a first embodiment, a method and computer program product for use in a storage system comprising quiescing IO commands the sites of an ACTIVE/ACTIVE storage system, the active/active storage system having at least two storage sites communicatively coupled via a virtualization layer, creating a change set, unquiescing IO commands by the virtualization layers, transferring data of a change set to the other sites of the active/active storage system by the virtualization layer, and flushing the data by the virtualization layer.In a second embodiment, a method and computer program product for use in a storage system comprising fracturing a cluster of an active/active storage system; wherein the cluster includes at least two sites, stopping IO on a first site of the cluster; and rolling to a point in time on the first site.

公开(公告)号：US09459804B1

公开(公告)日：2016-10-04

申请号：US14709894

申请日：2015-05-12

Applicant: EMC Corporation

Inventor： Assaf Natanzon ,  Saar Cohen ,  Steven R Bromling

IPC: G06F12/16 ,  G06F3/06 ,  G06F11/20

CPC classification number: G06F3/0619 ,  G06F3/065 ,  G06F3/0665 ,  G06F3/067 ,  G06F11/00 ,  G06F11/1456 ,  G06F11/2074

Abstract: A method, system, and computer program product for replication comprising allowing a subset of sites, wherein the sites comprise a first site, a second site and a third site and further wherein each site has a volume, to have active/active VSL replication, which presents two volumes at two different sites as a single volume, and another set of the sites to have a volume which is a replications of the volume presented by the VSL, and enabling the system to transparently shift which subset of the sites are replicated by the VSL and which sites are replications of the volume presented by the VSL; where the replication of the VSL is performed by a second replication technique.