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https://issues.apache.org/jira/browse/HDFS-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14482953#comment-14482953
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Kai Zheng commented on HDFS-7715:
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bq.When do you have available time to make a phone call, I want to disscuss
with you by phone
Maybe you could have some thoughts first before we can make the call. How about
on this Thursday afternoon?
bq.Can I upload the test codes alone?
I thought you could upload it just for me to review. While when committing, I'm
not so sure. Let's upload it first.
bq.maybe pb_index is ok
No,it's not in the good style. How about {{pbIndex}}?
bq.we need change private to protected of numDataUnits, numParityUnits in
AbstractRawErasureCoder
No. It's good to have the temp variables, but please use good names,
consistently.
Others sound good to me.
> 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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