John Zhuge created HDFS-10294:
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Summary: Balancer configures DN properties
Key: HDFS-10294
URL: https://issues.apache.org/jira/browse/HDFS-10294
Project: Hadoop HDFS
Issue Type: Sub-task
Components: balancer & mover
Affects Versions: 2.6.0
Reporter: John Zhuge
Assignee: John Zhuge
Priority: Critical
Balancer configures the 2 balance-related properties (bandwidthPerSec and
concurrentMoves) using NN API {{get/setBalancerBandwidth}} and the new
{{get/setBalancerConcurrentMoves}}.
Details:
* Upon the start of the balancer, set the DN properties.
* Use NN API to query and set the 2 properties. There might be a slight delay
for the property changes to be propagated to all DNs.
* The DN property changes will not survive restart.
* Balancer gets the property values from command line or its config file.
* No need to edit the config file on each DN or run {{hdfs dfsadmin
-setBalancerBandwidth}} to configure every DN in the cluster.
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