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From "Walter Su (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8494) Remove hard-coded chunk size in favor of ECZone
Date Thu, 11 Jun 2015 11:50:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581847#comment-14581847

Walter Su commented on HDFS-8494:

Zhe Zhang, Kai Zheng and I had a offline discussion. Here is what we thought:
A. Add a cellSize field in BlockInfoStriped as a workaround, and deal with memory usage in
follow-on, only if there is no trouble in FsIamge.
B. If there is trouble about FsImage, we need to figure out a final solution.

bq. we should consider adding a chunk size field to StripedBlockProto and removing the cell
size field from HdfsFileStatus.
I think it means it's ok with approach A, right?. Let's do that. I created HDFS-8580.

> Remove hard-coded chunk size in favor of ECZone
> -----------------------------------------------
>                 Key: HDFS-8494
>                 URL: https://issues.apache.org/jira/browse/HDFS-8494
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: HDFS-7285
>            Reporter: Kai Sasaki
>            Assignee: Kai Sasaki
>             Fix For: HDFS-7285
>         Attachments: HDFS-8494-HDFS-7285-01.patch, HDFS-8494-HDFS-7285-02.patch
> It is necessary to remove hard-coded values inside NameNode configured in {{HdfsConstants}}.
In this JIRA, we can remove {{chunkSize}} gracefully in favor of HDFS-8375.
> Because {{cellSize}} is now originally stored only in {{ErasureCodingZone}}, {{BlockInfoStriped}}
can receive {{cellSize}} in addition to {{ECSchema}} when its initialization.

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