Non-intrusive crash consistent copying in distributed storage systems without client cooperation
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United States of America Patent
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May 8, 2001
Grant Date -
N/A
app pub date -
Jan 30, 1998
filing date -
Jan 30, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A method for controlling access to a storage element that forms a portion of a logical storage device includes setting a write-barrier value to a first value upon receiving a request to copy the contents of the logical storage device. Write operations to the storage element are prohibited with the write-barrier value set to the first value. The portions of the logical storage device associated with the storage element are then copied. Upon the completion of the copying, the write-barrier value is then set to a second value.
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