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TRANSPARENT FAILOVER

  • US 20140372521A1
  • Filed: 09/02/2014
  • Published: 12/18/2014
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
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1. A computer implemented method of providing consistent availability to clients accessing a shared file system on a server cluster, the method comprising:

  • receiving at a file server a request to connect to the file server to access file information in a shared file system, the first request being formatted according to a file access protocol, wherein the file server is one of a plurality of servers in a server cluster;

    sending a response from the file server, the response establishing a session with a client for allowing access to file information in the shared file system, the response being formatted according to the file access protocol;

    receiving a request at the file server to open a persistent handle on the file server for accessing a file in the shared file system by the client, the request including a handle identifier provided by the client;

    in response to receiving the request, the file server;

    storing first state information about the session in association with the handle identifier; and

    sending a response to the client granting access to the file;

    after a client disconnect, receiving a request to reestablish the session using the persistent handle; and

    reestablishing the session using the first state information.

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