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From "Takanobu Asanuma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7687) Change fsck to support EC files
Date Tue, 21 Apr 2015 22:01:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505877#comment-14505877
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Takanobu Asanuma commented on HDFS-7687:
----------------------------------------

Thanks for your review, Nicholas!

bq. A Corrupt EC block group could have >= 6 blocks but some of the blocks are corrupted.
bq. Yes, it is possible. E.g. a datanode D0 dies and a EC block in D0 is reconstructed in
another datanode D1. Later on, D0 comes back. Then, both D0 and D1 have the same EC block
and the block group could have more than 9 blocks.
OK, I understand.

bq. For #1, see if you want to create a JIRA for trunk to do some refactoring first.
You mean, if it needs to do some refactoring, we should do refactoring in trunk branch first
before we add the logic to handle EC?

> Change fsck to support EC files
> -------------------------------
>
>                 Key: HDFS-7687
>                 URL: https://issues.apache.org/jira/browse/HDFS-7687
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Takanobu Asanuma
>
> We need to change fsck so that it can detect "under replicated" and corrupted EC files.



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