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From "Surendra Singh Lilhore (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11291) Avoid unnecessary edit log for setStoragePolicy() and setReplication()
Date Sat, 07 Jan 2017 08:05:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15807066#comment-15807066
] 

Surendra Singh Lilhore commented on HDFS-11291:
-----------------------------------------------

Thanks [~linyiqun] for review..

bq. Now I see there are some checkstyle and whitespace warnings generated, would you have
a clean up?

Checkstyle is related to method length and I think we no need to fix. Whitespace I will remove
in next patch..

I will wait for others review.


> Avoid unnecessary edit log for setStoragePolicy() and setReplication()
> ----------------------------------------------------------------------
>
>                 Key: HDFS-11291
>                 URL: https://issues.apache.org/jira/browse/HDFS-11291
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Surendra Singh Lilhore
>            Assignee: Surendra Singh Lilhore
>         Attachments: HDFS-11291.001.patch, HDFS-11291.002.patch
>
>
> We are setting the storage policy for file without checking the current policy of file
for avoiding extra getStoragePolicy() rpc call. Currently namenode is not checking the current
storage policy before setting new one and adding edit logs. I think if the old and new storage
policy is same we can avoid set operation.



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