-
Type:
Improvement
-
Status: Resolved
-
Priority:
Minor
-
Resolution: Fixed
-
Affects Version/s: 2.6.0
-
Fix Version/s: 2.8.0, 3.0.0-alpha1
-
Component/s: balancer & mover
-
Labels:
-
Target Version/s:
Adjust the default values to better support the current level of customer host and network configurations.
Increase the default for property dfs.datanode.balance.bandwidthPerSec from 1 to 10 MB. Apply to DN. 10 MB/s is about 10% of the GbE network.
Increase the default for property dfs.datanode.balance.max.concurrent.moves from 5 to 50. Apply to DN and Balancer. The default number of DN receiver threads is 4096. The default number of balancer mover threads is 1000.