[
https://issues.apache.org/jira/browse/HDFS-9635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15096240#comment-15096240
]
Yong Zhang commented on HDFS-9635:
----------------------------------
Hi [~andrew.wang], thanks for your comment. BlockPlacementPolicy consider
DataNode writing load, but current VolumeCoosingPolicy not consider writing
load on disk. we had some customers face some disks IO busy but some free in
same DataNode, we want to balance the writing thread on different disk with
same storage type.
So a DataXceiver monitor and some metrics will be added, and the new
VolumeCoosingPolicy will choose the free disk.
> Add one more volume choosing policy with considering volume IO load
> -------------------------------------------------------------------
>
> Key: HDFS-9635
> URL: https://issues.apache.org/jira/browse/HDFS-9635
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Yong Zhang
> Assignee: Yong Zhang
>
> We have RoundRobinVolumeChoosingPolicy and
> AvailableSpaceVolumeChoosingPolicy, but both not consider volume IO load.
> This jira will add a Add one more volume choosing policy base on how many
> xceiver count on volume.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
