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  1. Hadoop HDFS
  2. HDFS-7345

Local Repairable Codes (LRC)

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Details

    • New Feature
    • Status: In Progress
    • Major
    • Resolution: Unresolved
    • None
    • None
    • erasure-coding
    • None

    Description

      HDFS-7285 proposes to support Erasure Coding inside HDFS, supports multiple Erasure Coding codecs via pluggable codec framework (HDFS-7337) and implements Reed Solomon code by default. This is to support a more advanced coding mechanism, Local Repairable Codes (LRC). As discussed in Xorbas Hadoop Project Page and the paper attached there, LRC can reduce the number of erasure coding chunks that need to be read when recovering missing data chunks, while still keeping the storage overhead low.

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        1. LRC-compare.pdf
          211 kB
          Kai Zheng

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              hitliuyi Yi Liu
              drankye Kai Zheng
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              Dates

                Created:
                Updated: