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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11503) Integrate Chocolate Cloud RS coder implementation
Date Thu, 30 Mar 2017 17:01:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15949413#comment-15949413
] 

Wei-Chiu Chuang commented on HDFS-11503:
----------------------------------------

Hello [~sw0rdf1sh] thanks much for your patch, and here's my two cents:

This patch relies on ChocolateCloud-RS library, which is not available in the precommit Jenkins
job, so we can't unit test it.
I also can't access the website mentioned in the doc (https://www.chocolate-cloud.cc/hdfs-plugins)
so not sure if we can install it on the Jenkins slaves, or if I can download it and test it
locally

I am also not sure the implication of depending on a proprietary library. There are of course
other vendors developing all kinds of proprietary plugins for Hadoop, but typically the plugin
interface is pretty clean.

> Integrate Chocolate Cloud RS coder implementation
> -------------------------------------------------
>
>                 Key: HDFS-11503
>                 URL: https://issues.apache.org/jira/browse/HDFS-11503
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Andrew Wang
>            Assignee: Marcell Feher
>         Attachments: HDFS-11503.patch
>
>
> Quote from Marcell on HDFS-7285:
> First of all let me introduce ourselves: we are Chocolate Cloud from Denmark, we use
erasure coding to improve storage solutions. We already have Reed-Solomon and Random Linear
Network Coding backends for Liberasurecode, and now we are at the final stage of developing
our RS plugin to HDFS-EC. The performance of our plugin is similar to ISA-L's, in some configurations
we are better, in others we are worse (our initial speed comparison charts can be found here:
https://www.chocolate-cloud.cc/Plugins/HDFS-EC/hdfs.html).
> We would like our plugin to become officially supported in Hadoop 3.0. We can already
provide a preliminary version of our (native) library and a patch with the necessary glue
code for the next alpha release.
> I'd like to know your thoughts about whether it's possible and how it could be achieved.
> P.S: I'm happy to share more details if there's interest



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