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Transparent file migration using namespace replication

  • US 8,180,843 B2
  • Filed: 01/24/2008
  • Issued: 05/15/2012
  • Est. Priority Date: 04/24/2003
  • Status: Active Grant
First Claim
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1. A method for accessing an object in a storage network, comprising:

  • receiving a NAS (Network Attached Storage) file handle for the object including a location of the object on a source file server;

    sending to a client as representative of the object, a switch file handle for the object that is independent of the location of the object;

    migrating the object from the location on the source file server to a location on a destination file server,wherein the migrating comprises replicating a namespace associated with the object, the namespace located on the source file server and the replication of the namespace occurring separately from migrating data associated with the object;

    receiving from the client an access request associated with the switch file handle;

    mapping the switch file handle to the NAS file handle; and

    sending the access request to the location on the destination file server using the NAS file handle.

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