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https://issues.apache.org/jira/browse/HDFS-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14394713#comment-14394713
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Kai Zheng commented on HDFS-7715:
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Jack,
I will review your patch in the following holiday. Another idea I previously
mentioned offline on phone with you ( I'm sorry not seriously thinking about
and discussing about it clearly here), is that we have another option to
implement HH, not in {{RawErasureCoder}} layer, but instead in {{ErasureCoder}}
layer, leveraging raw XOR and RS coders. At {{ErasureCoder}} layer, you are
able to customize and instruct {{ECBlock}} to handle the two sub-strips stuff.
Would you think about it ?
> Implement the Hitchhiker erasure coding algorithm
> -------------------------------------------------
>
> Key: HDFS-7715
> URL: https://issues.apache.org/jira/browse/HDFS-7715
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Zhe Zhang
> Assignee: jack liuquan
> Attachments: 7715-hitchhikerXOR-v2.patch,
> HDFS-7715-hhxor-decoder.patch, HDFS-7715-hhxor-encoder.patch
>
>
> [Hitchhiker |
> http://www.eecs.berkeley.edu/~nihar/publications/Hitchhiker_SIGCOMM14.pdf] is
> a new erasure coding algorithm developed as a research project at UC
> Berkeley. It has been shown to reduce network traffic and disk I/O by 25%-45%
> during data reconstruction. This JIRA aims to introduce Hitchhiker to the
> HDFS-EC framework, as one of the pluggable codec algorithms.
> The existing implementation is based on HDFS-RAID.
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