发明授权
- 专利标题: Multipoint database synchronization protocol to avoid data corruption
- 专利标题(中): 多点数据库同步协议,避免数据损坏
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申请号: US09457371申请日: 1999-12-09
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公开(公告)号: US06393419B1公开(公告)日: 2002-05-21
- 发明人: Lars Novak , Jörgen Birkler
- 申请人: Lars Novak , Jörgen Birkler
- 主分类号: G06F1730
- IPC分类号: G06F1730
摘要:
A database multipoint synchronization which allows multiple clients to simultaneously access and edit a database while avoiding inadvertent data corruption and ensuring the integrity of data within the database. A database manager, which may be configured as part of a database software application, keeps track of modifications saved to a database file and increments a modification change counter accordingly. When a client user accesses a database record, the database manager detects the modification change counter value. Then if that client seeks to save modifications to the database record, the database manager detects the current modification change counter value to discern whether other clients have saved modifications to the record following the access by the client presently seeking to save modifications. If the modification change counter has incremented, the client is denied authorization to save the modifications and offered a choice of alternative operations. In this way, the data within the database record is not corrupted due to inadvertently overwriting by another client's record.
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