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Aggregated lock management for locking aggregated files in a switched file system

  • US 8,417,681 B1
  • Filed: 03/20/2009
  • Issued: 04/09/2013
  • Est. Priority Date: 01/11/2001
  • Status: Active Grant
First Claim
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1. A file switch, comprising:

  • at least one processing unit coupled to a memory and configured to execute programmed instructions stored in the memory comprising;

    receiving a request from a client computing device to perform an operation on a subset of a specified user file;

    accessing a primary metafile that stores information identifying a subset of a plurality of file servers that store respective defined portions of the specified user file that together comprise the subset of the specified user file;

    sending a lock request to each file server in the subset of file servers, to obtain a lock on the respective portion of the specified user file stored therein;

    aggregating a lock acquisition result from each file server in the subset of fileservers to produce an aggregated lock acquisition result; and

    performing the operation on the subset of the specified user file when the aggregated lock acquisition result is a positive result.

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