发明授权
US08266111B2 Distributed database system providing data and space management methodology
有权
分布式数据库系统,提供数据和空间管理方法
- 专利标题: Distributed database system providing data and space management methodology
- 专利标题(中): 分布式数据库系统,提供数据和空间管理方法
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申请号: US12056201申请日: 2008-03-26
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公开(公告)号: US08266111B2公开(公告)日: 2012-09-11
- 发明人: Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
- 申请人: Mei-Lin Linda Lin , Fei Zhou , Joe Francis , Srikanth Sampath , Satya N. Ramachandran , Gangavara Prasad Varakur
- 申请人地址: US CA Dublin
- 专利权人: Sybase, Inc.
- 当前专利权人: Sybase, Inc.
- 当前专利权人地址: US CA Dublin
- 代理机构: Sterne, Kessler, Goldstein and Fox P.L.L.C.
- 主分类号: G06F7/00
- IPC分类号: G06F7/00
摘要:
A distributed database system providing data and space management methodology. In a distributed database system having an allocation page for tracking allocation and deallocation of data pages including a deallocation bit for tracking data page deallocation, a method for determining when to clear the deallocation bit during recovery comprises: during runtime operation, generating log records recording allocation and deallocation of data pages, setting the deallocation bit during deallocation of a data page by a transaction, and clearing the deallocation bit after the transaction has committed; during recovery following a failure, identifying a particular log record corresponding to the deallocation bit set during deallocation of a given data page; determining whether the deallocation of the given data page recorded in the particular log record committed prior to the failure; and if the deallocation of the given data page committed prior to the failure, clearing the deallocation bit.
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