Invention Grant
- Patent Title: Stale data detection
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Application No.: US14813664Application Date: 2015-07-30
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Publication No.: US10372676B2Publication Date: 2019-08-06
- Inventor: Thomas Rudolf Wenzel
- Applicant: NetApp Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: NetApp Inc.
- Current Assignee: NetApp Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Cooper Legal Group, LLC
- Main IPC: G06F16/11
- IPC: G06F16/11 ; G06F16/16 ; G06F16/23 ; G06F16/17

Abstract:
One or more techniques and/or systems are provided for detecting stale data and/or changed data. For example, a bitmap file may be maintained and mapped to an inofile describing various states of files of a file system. The bitmap file may be populated with bitmap records indicating whether files were accessed, modified, or have other states. The bitmap file may efficiently convey information used to determine whether files have not been accessed recently (e.g., stale data) or were recently modified (e.g., changed data) compared to the inofile because the bitmap file may comprise a fraction of the size of the inofile (e.g., a byte of information may be used to represent various states of one or more files). In this way, instead of evaluating a relatively larger inofile, the bitmap file may be evaluated to efficiently identify stale data for deletion or destaging and/or changed data for backup.
Public/Granted literature
- US20170031939A1 STALE DATA DETECTION Public/Granted day:2017-02-02
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