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Preserving redundancy in data deduplication systems

  • US 9,779,103 B2
  • Filed: 04/23/2012
  • Issued: 10/03/2017
  • Est. Priority Date: 04/23/2012
  • Status: Active Grant
First Claim
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1. A system for preserving data redundancy in a data deduplication system in a computing environment, comprising:

  • a file system module;

    a storage controller in communication with the file system module, wherein the file system module;

    receives a write command for writing a selected data segment to a physical storage location, wherein the selected data segment is at least one of a Superblock and file system metadata required to be stored repetitively on physical storage;

    determines whether the write command includes an indicator including at least one of a bit and a flag, the indicator designating that the selected data segment must not be subject to a deduplication operation;

    if the write command does not include the indicator, generates a fingerprint for the selected data segment and performing a deduplication operation on the selected data segment; and

    if the write command does include the indicator, bypasses the generating the fingerprint and the deduplication operation; and

    an application, operationally communicative with the file system module, wherein the application;

    provides a system call with an extended attribute indicating that the selected data segment must memory notwithstanding the selected data segment matching data written to the physical memory earlier in time.

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