hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Chris Trezzo (JIRA)" <j...@apache.org>
Subject [jira] [Work stopped] (HDFS-8875) Optimize the wait time in Balancer for federation scenario
Date Fri, 20 Jan 2017 18:45:26 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Work on HDFS-8875 stopped by Chris Trezzo.
> Optimize the wait time in Balancer for federation scenario
> ----------------------------------------------------------
>                 Key: HDFS-8875
>                 URL: https://issues.apache.org/jira/browse/HDFS-8875
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ming Ma
>            Assignee: Chris Trezzo
> Balancer has wait time between two consecutive iterations. That is to give some time
for block movement to be fully committed ( return from replaceBlock doesn't mean the NN's
blockmap has been updated and the block has been invalidated on the source node.).
> This wait time could be 23 seconds if {{dfs.heartbeat.interval}} is set to 10 and {{dfs.namenode.replication.interval}}
is to 3. In the case of federation, given we iterate through all namespaces in each iteration,
this wait time becomes unnecessary as while balancer is processing the next namespace, it
gives the previous namespace it just finished time to commit.
> In addition, Balancer calls {{Collections.shuffle(connectors);}} It doesn't seem necessary.

This message was sent by Atlassian JIRA

To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org

View raw message