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Parallel metadata service in storage area network environment

  • US 20030220974A1
  • Filed: 05/23/2002
  • Published: 11/27/2003
  • Est. Priority Date: 05/23/2002
  • Status: Active Grant
First Claim
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1. A method for accessing data in a shared storage environment, said method comprising the steps of:

  • establishing metadata file system control structures on at least some of a plurality of data processing nodes which share access to a set of data storage devices;

    sending a request to a first node which is one of said plurality of nodes to grant access to a file which is resident within said set of storage devices, said request being sent from a second node which does not belong to said plurality of nodes;

    providing a lock for use by said first node, in response to said request, wherein said lock includes permission for said first node to allow said second node to directly access said file for a limited period of time;

    transferring metadata information pertaining to said file to said second node; and

    accessing said file during said limited time from said second node using said transferred metadata information.

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