- Patent Title: Low overhead resynchronization snapshot creation and utilization
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Application No.: US14980345Application Date: 2015-12-28
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Publication No.: US09727262B2Publication Date: 2017-08-08
- Inventor: Akhil Kaushik , Ripulkumar Hemantbhai Patel , Vrishali Dattatray Hajare , Andrew Eric Dunn , Rithin Kumar Shetty
- Applicant: NetApp Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: NetApp, Inc.
- Current Assignee: NetApp, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Cooper Legal Group, LLC
- Main IPC: G06F11/00
- IPC: G06F11/00 ; G06F3/06 ; G06F11/14

Abstract:
One or more techniques and/or computing devices are provided for resynchronization. For example, a request may be received to create pseudo snapshots of a first consistency group, hosted by a first storage controller, and a second consistency group, hosted by a second storage controller, having a synchronous replication relationship with the first consistency group. Incoming client write requests are logged within an intercept tracking log at the first storage controller. After a first drain without hold of incoming write requests is performed, a first pseudo common snapshot of the second consistency group is created. After a second drain without hold of incoming write operations is performed, a second pseudo common snapshot of the first consistency group and the intercept tracking log is created. The pseudo snapshots and the intercept tracking log (e.g., indicating a delta between the pseudo snapshots) are used to resynchronize the first and second consistency groups.
Public/Granted literature
- US20170185323A1 LOW OVERHEAD RESYNCHRONIZATION SNAPSHOT CREATION AND UTILIZATION Public/Granted day:2017-06-29
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