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https://issues.apache.org/jira/browse/HDFS-8538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17136810#comment-17136810
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Stephen O'Donnell commented on HDFS-8538:
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As this is an old Jira and there was some objections to this change
historically, I asked on the mailing list to see if the community was happy to
make this change.
To add some context, in the 5 years since this change was suggested, at
Cloudera we have seen about 1000 clusters running with Available Space enabled,
and we have not seen any issues caused by it. It feels like this policy should
be the default, as we have to change it more often than not.
>From the mailing list, I got 3 +1's to move forward with making
>AvailableSpaceVolumeChoosingPolicy the default from 3.4.0 and no objections.
Archives are at:
http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-dev/202004.mbox/browser
and
http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-dev/202005.mbox/browser
With that in mind I will move forward on this in a week or so, unless anyone
objects here.
> Change the default volume choosing policy to
> AvailableSpaceVolumeChoosingPolicy
> -------------------------------------------------------------------------------
>
> Key: HDFS-8538
> URL: https://issues.apache.org/jira/browse/HDFS-8538
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.7.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Major
> Attachments: hdfs-8538.001.patch
>
>
> For datanodes with different sized disks, they almost always want the
> available space policy. Users with homogenous disks are unaffected.
> Since this code has baked for a while, let's change it to be the default.
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