Invention Grant
- Patent Title: Version garbage collection using snapshot lists
- Patent Title (中): 使用快照列表的版本垃圾回收
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Application No.: US13750204Application Date: 2013-01-25
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Publication No.: US09098522B2Publication Date: 2015-08-04
- Inventor: Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
- Applicant: Juchang Lee , Chang Gyoo Park , Yongjae Chuh , Jaeyun Noh , Michael Muehle
- Applicant Address: DE Walldorf
- Assignee: SAP SE
- Current Assignee: SAP SE
- Current Assignee Address: DE Walldorf
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
Systems, methods and computer program product embodiments for providing version garbage collection using snapshot lists are disclosed herein. Version garbage collection using snapshot lists includes storing, by at least one processor, versions of a record in a database table, the record comprising a record value and a version timestamp, storing, by the at least one processor, active snapshots in two levels of active snapshot lists, an active snapshot comprising a transaction identifier and a snapshot timestamp, determining, by the at least one processor, a minimum active snapshot from the active snapshots in the two levels of active snapshot lists and deleting, by the at least one processor, versions of the record having a version timestamp earlier than a snapshot timestamp of the minimum active snapshot.
Public/Granted literature
- US20140149353A1 Version Garbage Collection Using Snapshot Lists Public/Granted day:2014-05-29
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