Invention Grant
- Patent Title: Cache recovery method in a distributed storage system
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Application No.: US16050075Application Date: 2018-07-31
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Publication No.: US10664397B2Publication Date: 2020-05-26
- Inventor: Vladimir Shveidel , Lior Kamran
- Applicant: EMC IP Holding Company LLC
- Applicant Address: US MA Hopkinton
- Assignee: EMC IP Holding Company LLC
- Current Assignee: EMC IP Holding Company LLC
- Current Assignee Address: US MA Hopkinton
- Agency: Daly, Crowley Mofford & Durkee, LLP
- Main IPC: G06F12/0815
- IPC: G06F12/0815 ; G06F11/07 ; G06F12/0891

Abstract:
An aspect of cache recovery includes transmitting entries of a write cache (WC) journal (“entries”) to all nodes and, for each node, recovering the entries, detecting entries with a logical address owned by the node, and performing a recovery operation. The operation includes for each entry, and upon determining the node owns the A2N slice: if the A2N slice has been continuously owned (CO) by the node, and the entry is not owned by the node, marking the entry as WC remote and entry updates are requested from a remote WC owner; if the A2N slice has not been CO by the node, and the entry is not owned by the node, maintaining the entry and continuing write flow operations, marking the entry as WC remote and all entry updates are requested from the remote WC owner and inserting the entry to a recovery list.
Public/Granted literature
- US20200042445A1 CACHE RECOVERY METHOD IN A DISTRIBUTED STORAGE SYSTEM Public/Granted day:2020-02-06
Information query
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