[jira] [Commented] (HDFS-1804) Modify or add a new block-volume device choosing policy that looks at free space

["Harsh J Chouraria (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015883#comment-13015883 ] 

Harsh J Chouraria commented on HDFS-1804:
-----------------------------------------

Would using a k-smallest algorithm on the volumes list, along with a round robin after that be a good way to do this?

> Modify or add a new block-volume device choosing policy that looks at free space
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-1804
>                 URL: https://issues.apache.org/jira/browse/HDFS-1804
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: data-node
>            Reporter: Harsh J Chouraria
>            Priority: Minor
>             Fix For: 0.23.0
>
>
> HDFS-1120 introduced pluggable block-volume choosing policies, but still carries the vanilla RoundRobin as its default.
> An additional implementation that also takes into consideration the free space remaining on the disk (or other params) should be a good addition as an alternative to vanilla RR.

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