Invention Grant
- Patent Title: Removing cached data
- Patent Title (中): 删除缓存的数据
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Application No.: US14495379Application Date: 2014-09-24
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Publication No.: US09588906B2Publication Date: 2017-03-07
- Inventor: Xinlei Xu , Yongjun Wu , Lei Xue , Xiongcheng Li , Peng Xie
- Applicant: EMC Corporation
- Applicant Address: US MA Hopkinton
- Assignee: EMC IP Holding Company LLC
- Current Assignee: EMC IP Holding Company LLC
- Current Assignee Address: US MA Hopkinton
- Agent Krishnendu Gupta; Konrad R. Lee
- Priority: CN201310466038 20130927
- Main IPC: G06F12/12
- IPC: G06F12/12

Abstract:
Embodiments of the present invention provide a method and apparatus for removing cached data. The method comprises determining activeness of a plurality of divided lists; ranking the plurality of divided lists according to the determined activeness of the plurality of divided lists. The method comprises removing a predetermined amount of cached data from the plurality of divided lists according to the ranking result when the used capacity in the cache area reaches a predetermined threshold. Through embodiments of the present invention, the activeness of each divided list may be used to wholly measure the heat of access to the cached data included by each divided list, and upon removal, the cached data with lower heat of access in the whole system can be removed and the cached data with higher heat of access in the whole system can be retained so as to improve the read/write rate of the system.
Public/Granted literature
- US20150095587A1 REMOVING CACHED DATA Public/Granted day:2015-04-02
Information query