[
https://issues.apache.org/jira/browse/HDFS-9761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137340#comment-15137340
]
Chris Nauroth commented on HDFS-9761:
-------------------------------------
[~abridgett], yeah, I'm hooked! :-) Please do feel free to file more bug
reports if you find other problems. We welcome contributions. If you get the
urge to patch something, here are instructions on how the contribution process
works.
https://wiki.apache.org/hadoop/HowToContribute
> Rebalancer sleeps too long between iterations
> ---------------------------------------------
>
> Key: HDFS-9761
> URL: https://issues.apache.org/jira/browse/HDFS-9761
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Reporter: Adrian Bridgett
> Assignee: Mingliang Liu
> Priority: Blocker
> Fix For: 2.8.0
>
> Attachments: HDFS-9761.000.patch
>
>
> Whilst reading the code to try and determine why I'm seeing bad performance I
> think I've spotted an inadvertent move of a sleep() to inside a for loop.
> This means that instead of sleeping once per iteration the balance is
> sleeping once per namenode per iteration. If I've done my maths correctly
> the sleep time default is 18seconds so this is a nice little speedup for HA
> clusters.
> Commit d31a41c35927f02f2fb40d19380b5df4bb2b6d57 moved the sleep in
> org/apache/hadoop/hdfs/server/balancer/Balancer.java:run()
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
