Invention Grant
- Patent Title: Method to resolve conflicts during recovery in a storage system
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Application No.: US16175979Application Date: 2018-10-31
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Publication No.: US10698774B2Publication Date: 2020-06-30
- Inventor: Ying Hu , Xiangping Chen
- 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: G06F16/00
- IPC: G06F16/00 ; G06F11/14 ; G06F3/06

Abstract:
An aspect of resolving conflicts during recovery operations includes separating journal entries for first and second types of recovery operations into each of a first and second array. For each entry in the first array, an aspect includes taking a range lock of a designated number of the addresses and creating an entry in a table. For each entry in the second array, an aspect includes upon determining a corresponding sub-LUN has been locked for an entry in the first array, incrementing a count in the table. Upon determining the corresponding sub-LUN is not locked for the entry, an aspect includes taking the address lock for the entry in the second array. An aspect further includes opening gates for a corresponding address, performing a first recovery operation corresponding to the first type of recovery operation, and performing a second recovery operation corresponding to the second type of recovery operation.
Public/Granted literature
- US20200133798A1 METHOD TO RESOLVE CONFLICTS DURING RECOVERY IN A STORAGE SYSTEM Public/Granted day:2020-04-30
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