System and method for redirecting access to a remote mirrored snapshot
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United States of America Patent
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Mar 7, 2006
Grant Date -
Sep 25, 2003
app pub date -
Mar 19, 2002
filing date -
Mar 19, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In a system and method for updating a remote replicated destination file system snapshot with changes in a source file system snapshot, users and processes are redirected to a local exported snapshot of the replicated snapshot on the active file system on the destination before beginning the next update of the active file system's replicated snapshot. In this manner, an unstable replicated snapshot is not accessed. Indirection is introduced into inode lookup at the destination as the destination's active file system is being updated. The indirection can be based upon a snapshot ID that conforms to a latest exported snapshot ID.
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