Mei-Ling Lin

US Patent:

20150134900, May 14, 2015

Filed:

Nov 8, 2013

Appl. No.:

14/075577

Inventors:

Mei-Ling LIN - Pleasanton CA, US
Blaine FRENCH - Concord MA, US

International Classification:

G06F 12/08

US Classification:

711113

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.