Transactional log with multi-sector log block validation
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United States of America Patent
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Apr 27, 2004
Grant Date -
N/A
app pub date -
Jun 2, 1999
filing date -
Jun 2, 1999
priority date (Note) -
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Abstract
A transaction processing system writes log records containing transaction information into a log file in blocks of multiple disk sectors in size. The system writes a cryptographic hash result of the log block's data into a header portion of the log block. The system uses the cryptographic hash result to identify an active run of the log blocks that contains current log records of the transaction processing system. The system truncates a prefix of log blocks from the active run by modifying a part of the log block so as to invalidate the written cryptographic hash result of the log block.
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