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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10519) Add a configuration option to enable in-progress edit log tailing
Date Wed, 27 Jul 2016 23:20:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15396635#comment-15396635
] 

Andrew Wang commented on HDFS-10519:
------------------------------------

LGTM, thanks Jiayi! +1 pending Jenkins.

> Add a configuration option to enable in-progress edit log tailing
> -----------------------------------------------------------------
>
>                 Key: HDFS-10519
>                 URL: https://issues.apache.org/jira/browse/HDFS-10519
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: ha
>            Reporter: Jiayi Zhou
>            Assignee: Jiayi Zhou
>            Priority: Minor
>         Attachments: HDFS-10519.001.patch, HDFS-10519.002.patch, HDFS-10519.003.patch,
HDFS-10519.004.patch, HDFS-10519.005.patch, HDFS-10519.006.patch, HDFS-10519.007.patch, HDFS-10519.008.patch,
HDFS-10519.009.patch, HDFS-10519.010.patch, HDFS-10519.011.patch, HDFS-10519.012.patch, HDFS-10519.013.patch
>
>
> Standby Namenode has the option to do in-progress edit log tailing to improve the data
freshness. In-progress tailing is already implemented, but it's not enabled as default configuration.
And there's no related configuration key to turn it on.
> Adding a related configuration key to let Standby Namenode is reasonable and would be
a basis for further improvement on Standby Namenode.



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