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Wei-Chiu Chuang edited comment on HDFS-14675 at 8/18/19 2:26 AM: ----------------------------------------------------------------- Also worth noting the HDP's HDFS balancer doc recommendation where there are background mode and fast mode: https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.5/bk_hdfs-administration/content/recommended_configurations.html was (Author: jojochuang): Also worth noting the HDP's HDFS balancer doc recommendation: https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.5/bk_hdfs-administration/content/recommended_configurations.html > Increase Balancer Defaults Further > ---------------------------------- > > Key: HDFS-14675 > URL: https://issues.apache.org/jira/browse/HDFS-14675 > Project: Hadoop HDFS > Issue Type: Improvement > Components: balancer & mover > Affects Versions: 3.3.0 > Reporter: Stephen O'Donnell > Assignee: Stephen O'Donnell > Priority: Major > Attachments: HDFS-14675.001.patch > > > HDFS-10297 increased the balancer defaults to 50 for > dfs.datanode.balance.max.concurrent.moves and to 10MB/s for > dfs.datanode.balance.bandwidthPerSec. > We have found that these settings often have to be increased further as users > find the balancer operates too slowly with 50 and 10MB/s. We often recommend > moving concurrent moves to between 200 and 300 and setting the bandwidth to > 100 or even 1000MB/s, and these settings seem to work well in practice. > I would like to suggest we increase the balancer defaults further. I would > suggest 100 for concurrent moves and 100MB/s for the bandwidth, but I would > like to know what others think on this topic too. -- This message was sent by Atlassian JIRA (v7.6.14#76016) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org