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From "GAO Rui (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7864) Erasure Coding: Update safemode calculation for striped blocks
Date Mon, 23 Mar 2015 23:58:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14376947#comment-14376947
] 

GAO Rui commented on HDFS-7864:
-------------------------------

[~jingzhao] Thank you very much for all your help. I learned a lot about HDFS block management
during this jira. Next, I will work on [https://issues.apache.org/jira/browse/HDFS-7661] and
[https://issues.apache.org/jira/browse/HDFS-7618] to improve read support of striped blocks.
 Thank you again!

> Erasure Coding: Update safemode calculation for striped blocks
> --------------------------------------------------------------
>
>                 Key: HDFS-7864
>                 URL: https://issues.apache.org/jira/browse/HDFS-7864
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: GAO Rui
>             Fix For: HDFS-7285
>
>         Attachments: HDFS-7864.1.patch, HDFS-7864.2.patch, HDFS-7864.3.patch, HDFS-7864.4.patch
>
>
> We need to update the safemode calculation for striped blocks. Specifically, each striped
block now consists of multiple data/parity blocks stored in corresponding DataNodes. The current
code's calculation is thus inconsistent: each striped block is only counted as 1 expected
block, while each of its member block may increase the number of received blocks by 1.



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