Invention Grant
- Patent Title: Handling metadata operations and timestamp changes during resynchronization
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Application No.: US16401257Application Date: 2019-05-02
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Publication No.: US11461280B2Publication Date: 2022-10-04
- Inventor: Akhil Kaushik , Krishna Murthy Chandraiah setty Narasingarayanapeta
- 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
- Priority: IN201841029907 20180809
- Main IPC: G06F16/178
- IPC: G06F16/178 ; G06F16/27 ; G06F16/23 ; G06F16/18

Abstract:
Techniques are provided for resynchronizing a synchronous replication relationship. Asynchronous incremental transfers are performed to replicate data of a storage object to a replicated storage object. Incoming write requests, targeting the storage object, are logged into a dirty region log during a last asynchronous incremental transfer. Metadata operations, executed on the storage object, are logged into a metadata log during the last asynchronous incremental transfer. Sequence numbers are assigned to the metadata operations based upon an order of execution. The metadata operations are replicated to the replicated storage object for execution according to the sequence numbers, and the dirty regions are replicated to the replicated storage object in response to the metadata operations having been replicated to the replicated storage object. The storage object and replicated storage object are transitioned to a synchronous replication state where incoming operations are synchronously replicated to the replicated storage object.
Public/Granted literature
- US20200050587A1 HANDLING METADATA OPERATIONS AND TIMESTAMP CHANGES DURING RESYNCHRONIZATION Public/Granted day:2020-02-13
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