Adrian Bridgett created HDFS-9761:
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Summary: Rebalancer sleeps too long between iterations
Key: HDFS-9761
URL: https://issues.apache.org/jira/browse/HDFS-9761
Project: Hadoop HDFS
Issue Type: Bug
Components: balancer & mover
Reporter: Adrian Bridgett
Priority: Minor
Whilst reading the code to try and determine why I'm seeing bad performance I
think I've spotted an inadvertent move of a sleep() to inside a for loop.
This means that instead of sleeping once per iteration the balance is sleeping
once per namenode per iteration. If I've done my maths correctly the sleep
time default is 18seconds so this is a nice little speedup for HA clusters.
Commit d31a41c35927f02f2fb40d19380b5df4bb2b6d57 moved the sleep in
org/apache/hadoop/hdfs/server/balancer/Balancer.java:run()
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