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Wei-Chiu Chuang commented on HDFS-8824: --------------------------------------- Looks like HDFS-13222 address Kihwal's concern. It makes it easy to tune the small block parameter from balancer side. > Do not use small blocks for balancing the cluster > ------------------------------------------------- > > Key: HDFS-8824 > URL: https://issues.apache.org/jira/browse/HDFS-8824 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: balancer & mover > Reporter: Tsz Wo Nicholas Sze > Assignee: Tsz Wo Nicholas Sze > Priority: Major > Fix For: 2.8.0, 2.7.4, 3.0.0-alpha1 > > Attachments: h8824_20150727b.patch, h8824_20150811b.patch > > > Balancer gets datanode block lists from NN and then move the blocks in order > to balance the cluster. It should not use the blocks with small size since > moving the small blocks generates a lot of overhead and the small blocks do > not help balancing the cluster much. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org