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From "Ravi Prakash (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12011) Add a new load balancing volume choosing policy
Date Tue, 27 Jun 2017 16:44:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065098#comment-16065098
] 

Ravi Prakash commented on HDFS-12011:
-------------------------------------

HI Chencan!

Thanks for your contribution. Could you please detail more of your experimental setup? How
many nodes and how many disks? How many clients? What was the diversity of the clients? How
often do volumes with low load change into volumes with high load?

I feel like we should get more attention on this JIRA if we want to get it in.

> Add a  new load balancing volume choosing policy
> ------------------------------------------------
>
>                 Key: HDFS-12011
>                 URL: https://issues.apache.org/jira/browse/HDFS-12011
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: chencan
>            Assignee: chencan
>         Attachments: HADOOP-12011.002.patch, HADOOP-12011.patch
>
>
>     There  are two types of volume choosing policies when choose a volume inner a datanode
to write in a datablock : RoundRobinVolumeChoosingPolicy and AvailableSpaceVolumeChoosingPolicy.This
two policies do not take into account the fsvolume's load. We can add a new load balancing
volume choosing policy,  using existing reference in FsVolumeImpl.



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