Invention Grant
- Patent Title: Continuous data replication
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Application No.: US14706104Application Date: 2015-05-07
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Publication No.: US09235481B1Publication Date: 2016-01-12
- Inventor: Assaf Natanzon , Saar Cohen , Steven R Bromling
- Applicant: EMC Corporation
- Applicant Address: US MA Hopkinton
- Assignee: EMC Corporation
- Current Assignee: EMC Corporation
- Current Assignee Address: US MA Hopkinton
- Agent Krishnendu Gupta; Joseph D'Angelo
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F11/34 ; G06F1/24 ; G06F11/16 ; G06F17/30 ; G06F11/07

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.
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