[
https://issues.apache.org/jira/browse/HDFS-10987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573882#comment-15573882
]
Brahma Reddy Battula commented on HDFS-10987:
---------------------------------------------
Thanks all.
> Make Decommission less expensive when lot of blocks present.
> ------------------------------------------------------------
>
> Key: HDFS-10987
> URL: https://issues.apache.org/jira/browse/HDFS-10987
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Priority: Critical
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: HDFS-10987-002.patch, HDFS-10987.patch
>
>
> When user want to decommission a node which having 50M blocks +,it could hold
> the namesystem lock for long time.We've seen it is taking 36 sec+.
> As we knew during this time, Namenode will not available... As this
> decommission will continuosly run till all the blocks got replicated,hence
> Namenode will unavailable.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
