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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11975) Provide a system-default EC policy
Date Thu, 06 Jul 2017 05:20:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075948#comment-16075948
] 

Kai Zheng commented on HDFS-11975:
----------------------------------

Great you made it and figured out the root cause. I'll review the updated patch later and
hope we can get it in soon.

> Provide a system-default EC policy
> ----------------------------------
>
>                 Key: HDFS-11975
>                 URL: https://issues.apache.org/jira/browse/HDFS-11975
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Lei (Eddy) Xu
>            Assignee: luhuichun
>         Attachments: HDFS-11975-001.patch, HDFS-11975-002.patch, HDFS-11975-003.patch,
HDFS-11975-004.patch, HDFS-11975-005.patch, HDFS-11975-006.patch
>
>
> From the usability point of view, it'd be nice to be able to specify a system-wide EC
policy, i.e., in {{hdfs-site.xml}}. For most of users / admin / downstream projects, it is
not necessary to know the tradeoffs of the EC policy, considering that it requires the knowledge
of EC, the actual physical topology of the clusters, and many other factors (i.e., network,
cluster size and etc).
>  



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