Invention Grant
- Patent Title: Cache efficiency in a shared disk database cluster
- Patent Title (中): 共享磁盘数据库集群中的缓存效率
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Application No.: US14075577Application Date: 2013-11-08
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Publication No.: US09262415B2Publication Date: 2016-02-16
- Inventor: Mei-Lin Lin , Blaine French
- Applicant: Mei-Lin Lin , Blaine French
- Applicant Address: US CA Dublin
- Assignee: SYBASE, INC.
- Current Assignee: SYBASE, INC.
- Current Assignee Address: US CA Dublin
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F17/30

Abstract:
Disclosed herein are system, method, and computer program product embodiments for storing and accessing data in a shared disk database system using a timestamp range to improve cache efficiency. An embodiment operates by retrieving, by a node, from a shared storage. a blockmap identity and a root page associated with a data request, based on a determination that the blockmap identity associated with a data request is present in a cache. The embodiment continues, retrieving, by the node, the logical page by copying a stored logical page from the shared storage and setting a lower timestamp value of the logical page to a timestamp associated with the stored logical page and an upper timestamp value of the logical page to a timestamp associated with the data request, based on a determination that the logical page is not present in the cache.
Public/Granted literature
- US20150134900A1 CACHE EFFICIENCY IN A SHARED DISK DATABASE CLUSTER Public/Granted day:2015-05-14
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