[jira] [Created] (IGNITE-25724) Add metrics related to unrebalanced partitions

["Vyacheslav Koptilin (Jira)" <ji...@apache.org>]

Vyacheslav Koptilin created IGNITE-25724:
--------------------------------------------

             Summary: Add metrics related to unrebalanced partitions
                 Key: IGNITE-25724
                 URL: https://issues.apache.org/jira/browse/IGNITE-25724
             Project: Ignite
          Issue Type: Improvement
          Components: metrics ai3
            Reporter: Vyacheslav Koptilin


I would suggest adding the following two metrics to zone metrics:
 * localUnrebalancedPartitionsCount - number of partitions that should be rebalanced to this node.

 * totalUnrebalancedPartitionsCount - total number of partitions that should be moved to a new owner.

 

I don't see any value in implementing these metrics for non-colocated clusters (see the colocation feature IGNITE-22115)

The calculation of these metrics can be based on the data provided by the metastorage:
 * zone.assignments.pending

 * zone.assignments.stable

totalUnrebalancedPartitionsCount = for each partition: if pending key is not empty for the partition, when +1
localUnrebalancedPartitionsCount = for each partition: if pending or planned key is not empty for the partition and this node is a data node for the partition, when +1



--
This message was sent by Atlassian Jira
(v8.20.10#820010)