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LIVE FILE SYSTEM MIGRATION

  • US 20130054530A1
  • Filed: 08/29/2011
  • Published: 02/28/2013
  • Est. Priority Date: 08/29/2011
  • Status: Active Grant
First Claim
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1. A method for migrating a source file system residing on a source server to a destination server, comprising:

  • sending a first snapshot of the source file system from the source server to the destination server;

    creating, using the first snapshot, a migrated file system on the destination server;

    sequentially sending, from the source server to the destination server, a plurality of snapshot deltas comprising modifications to the source file system;

    updating the migrated file system using the plurality of snapshot deltas;

    determining that a freeze threshold is exceeded based on a snapshot delta of the plurality of snapshot deltas;

    in response to determining that the freeze threshold is exceeded;

    freezing the source file system, wherein the source file system is active prior to freezing;

    sending, after freezing the source file system, a final snapshot delta from the source server to the destination server;

    updating the migrated file system using the final snapshot delta;

    creating, in the source file system, a file system husk referencing the migrated file system; and

    thawing the source file system and the migrated file system after updating the migrated file system.

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