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Distributed File System and Data Block Consistency Managing Method Thereof

  • US 20110161302A1
  • Filed: 07/30/2009
  • Published: 06/30/2011
  • Est. Priority Date: 08/04/2008
  • Status: Active Grant
First Claim
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1. A CHUNK consistency managing method in a distributed file system, and said method comprising the following steps of:

  • A. when generating a CHUNK, a file location register generating a counter value corresponding to the generated CHUNK and storing the counter value in both file access servers and the file location register;

    B. when writing data into a CHUNK, a file access client writing the data into a main and standby file access servers, and if the data is successfully written into both the main and standby file access servers, the file access client doing not to revise the counter value of the CHUNK into which the data is written;

    otherwise, the file access client increasing the counter value of the CHUNK into which the data is written in the file access servers into which the data is written successfully with a predetermined step length;

    C. said file location register, based on the counter values of the current CHUNK reported by the main and standby file access servers respectively, taking the CHUNK in a file access server whose counter value is maximal as normal and valid CHUNK, and taking the CHUNKs in other file access servers as abnormal CHUNKs and reconstructing the abnormal CHUNKs.

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