HDFS Balancer on Oracle Big Data Appliance Frequently Asked Questions (FAQ)
(Doc ID 2146339.1)
Last updated on FEBRUARY 18, 2023
Applies to:
Big Data Appliance Integrated Software - Version 4.2.0 and laterLinux x86-64
Purpose
HDFS Balancer frequently asked questions.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| Why would it appear that the bandwidth option is not working? |
| What property should be set to increase the number of threads for the balancer job? |
| If the balancer is run in the background is it possible to modify the configuration during balancer execution to increase parameters to speed balancing up? |
| If the balancer configuration is changed while the balancer is running what is the impact? |
| What happens if a DataNode goes down while the balancer is running? |
| Can the rebalance be stopped manually? |
| Is it possible to switch from running the balancer in the background to running the balancer with maximum speed in the middle of a rebalance by stopping the current running rebalance? |
| If the balancer does not run in the background, so that it runs as fast as possible, is there any impact on cluster services? |
| Should the cluster be in a healthy state before running the balancer? |
| Is it normal for the balancer to trigger warnings on the DataNodes? |