发明申请
US20100235326A1 METHOD FOR MIRRORING A LOG FILE BY THRESHOLD DRIVEN SYNCHRONIZATION 失效
通过阈值驱动同步来记录日志文件的方法

METHOD FOR MIRRORING A LOG FILE BY THRESHOLD DRIVEN SYNCHRONIZATION
摘要:
A method for of accelerating database log hardening using specific per block data protection and damage control is provided. A per write specification is implemented to determine when database log data is mirrored synchronously or asynchronously. Synchronous minoring is performed upon reaching a predetermined threshold, based on one or more parameters such as transaction value, both individual and cumulative, and the quantity of data written since the last synchronous minoring. As data is added to the database log, it is written specifying asynchronous minoring to the primary log file. Once a threshold is met, a write specifying synchronous minoring is performed to both the primary and secondary log files, thereby hardening the log file in both primary and secondary storage subsystem.
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