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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13010) Refactor raw erasure coders
Date Mon, 23 May 2016 06:55:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296003#comment-15296003
] 

Kai Zheng commented on HADOOP-13010:
------------------------------------

Hi [~cmccabe], would you help comment and let me know if above clarifying makes sense or not
to you? Note the only idea I'm not sure about is how to get rid of the factories, others sound
good to me and I can proceed with. Thanks a lot.

> Refactor raw erasure coders
> ---------------------------
>
>                 Key: HADOOP-13010
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13010
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>         Attachments: HADOOP-13010-v1.patch, HADOOP-13010-v2.patch, HADOOP-13010-v3.patch,
HADOOP-13010-v4.patch, HADOOP-13010-v5.patch
>
>
> This will refactor raw erasure coders according to some comments received so far.
> * As discussed in HADOOP-11540 and suggested by [~cmccabe], better not to rely class
inheritance to reuse the codes, instead they can be moved to some utility.
> * Suggested by [~jingzhao] somewhere quite some time ago, better to have a state holder
to keep some checking results for later reuse during an encode/decode call.
> This would not get rid of some inheritance levels as doing so isn't clear yet for the
moment and also incurs big impact. I do wish the end result by this refactoring will make
all the levels more clear and easier to follow.



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