Andrei Mikhalev created HDDS-9889:
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Summary: Configure adaptation for datanode limits in
ContainerBalancer
Key: HDDS-9889
URL: https://issues.apache.org/jira/browse/HDDS-9889
Project: Apache Ozone
Issue Type: Bug
Components: Balancer
Affects Versions: 1.4.0
Environment: {*}OS{*}: Ubuntu 22.04.3 LTS, {*}Arch{*}: 64-bit,
{*}Processor{*}: Intel Core i7-9750H CPU 2.6GHz x 12
Reporter: Andrei Mikhalev
Dynamical adaptation (introduced in HDDS-5526) for
{{datanodes.involved.max.percentage.per.iteration}} in container balancer
doesn't work well in some cases.
Sometimes the number of *under-utilized* nodes may not be sufficient to satisfy
the limit about the max percent of datanodes participating in the balance
iteration ({{{}datanodes.involved.max.percentage.per.iteration{}}}).
Thus, collections of source and target datanodes are reset and balancing is
skipped.
The issue it can be easily detected when cluster has few nodes (< 10), for
example 4 or 5.
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