Method and system for efficient write journal entry management for a distributed file system
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United States of America Patent
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Jun 4, 2013
Grant Date -
May 11, 2006
app pub date -
Oct 26, 2004
filing date -
Oct 26, 2004
priority date (Note) -
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Abstract
The present invention is directed to a method and system for efficient write journal entry management maintaining minimum write journal information stored in a nonvolatile memory through utilizing an additional structure in a fast volatile memory. The method and system may manage write journaling of a file volume including multiple fixed sized regions and assign a persistent 1-bit synchronization status (the write journal information) to each data region. In addition, a non-persistent I/O counter (the additional structure) for each region to manage the persistent 1-bit synchronization status during run-time. The present invention may provide a mechanism to determine when write I/O operations have not successfully completed to a specific region of the file volume.
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