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Partial block allocation for file system block compression using virtual block metadata

  • US 9,251,159 B1
  • Filed: 11/25/2013
  • Issued: 02/02/2016
  • Est. Priority Date: 03/29/2012
  • Status: Active Grant
First Claim
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1. A method of operating a file server, the file server having data storage storing a file system, a data processor coupled to the data storage for access to files in the file system, and non-transitory computer readable storage medium coupled to the data processor and storing computer instructions, and the computer instructions, when executed by the data processor, perform a method of writing a new block of data to a first file in the file system by the steps of:

  • (a) compressing the new block of data to produce compressed data for the first file;

    (b) finding a file system data block containing compressed data of a second file in the file system and having sufficient free space for storage of the compressed data for the first file;

    (c) writing the compressed data for the first file to the free space of the file system data block; and

    (d) linking the compressed data for the first file to the first file.

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