Invention Grant
- Patent Title: Cache management for sequential IO operations
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Application No.: US16777129Application Date: 2020-01-30
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Publication No.: US11200169B2Publication Date: 2021-12-14
- Inventor: Jack Fu , Jaeyoo Jung , Arieh Don
- 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: Muirhead and Saturnelli, LLC
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/084 ; G06F12/0862

Abstract:
A processing node of a storage system may determine that a host system is implementing a cache-slot aware, round-robin IO distribution algorithm (CA-RR). The processing node may be configured to determine when a sufficient number of sequential IOs will be received to consume a cache slot of the a processing node. If the processing node knows that the host system is implementing CA-RR, then, in response to determining the sufficient number, the processing node may send a communication informing the next processing node about the sequential cache slot hit. If the sequential IO operation(s) are read operation(s), the next processing node may prefetch at least a cache-slot worth of next consecutive data portions. If the sequential IO operation(s) are write operation(s), then the next processing node may request allocation of one or more local cache slots for the forthcoming sequential write operations.
Public/Granted literature
- US20210240621A1 CACHE MANAGEMENT FOR SEQUENTIAL IO OPERATIONS Public/Granted day:2021-08-05
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