Stephen O'Donnell created HDDS-7844:
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Summary: EC: Add normal and low priority to replication supervisor
and commands
Key: HDDS-7844
URL: https://issues.apache.org/jira/browse/HDDS-7844
Project: Apache Ozone
Issue Type: Sub-task
Components: Ozone Datanode, SCM
Reporter: Stephen O'Donnell
Assignee: Stephen O'Donnell
In order to allow replication commands to fix under and mis-replication to run
with higher priority that replication commands related to the balancer, we will
change the replication supervisor to be a priority queue, ordered by priority,
enqueue time.
Commands sent from the balancer will have a low priority, other commands will a
normal priority. This means that balancer commands will not run while there are
other replication commands present in the queue.
This means it is not important if the balancer adds a lot of replication
commands to the queue and then some nodes go down in the cluster. The
replication commands related to the down nodes will automatically get to the
front of the queue.
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