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https://issues.apache.org/jira/browse/HDFS-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14380708#comment-14380708
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Rashmi Vinayak commented on HDFS-7715:
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Hi Kai,
>I'm wondering if it could get resolved as we desire a code can be configurable
>and flexible.
My implementation on HDFS-RAID has a few hard-coded values for (10,4). Hence
this patch also has these hard-coded values. Once we have everything working
for (10,4) it will be an easy change to make it configurable and flexible to
work with any other parameters.
>Will it help if we reuse existing raw coders?
Making the parameters flexible and configurable is not related to reusing (or
not) of existing raw coders.
> 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: 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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