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Posted to issues@ignite.apache.org by "Vyacheslav Koptilin (Jira)" <ji...@apache.org> on 2025/08/18 11:00:02 UTC
[jira] [Updated] (IGNITE-25724) Add metrics related to unrebalanced partitions
[ https://issues.apache.org/jira/browse/IGNITE-25724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vyacheslav Koptilin updated IGNITE-25724:
-----------------------------------------
Description:
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, then +1
localUnrebalancedPartitionsCount = for each partition: if stable key does not contain the local node, but pending key does, then +1
||Metric Name||Description||
|localUnrebalancedPartitionsCount||
was:
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, then +1
localUnrebalancedPartitionsCount = for each partition: if stable key does not contain the local node, but pending key does, then +1
> 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
> Assignee: Vyacheslav Koptilin
> Priority: Major
> Labels: ignite-3
> Fix For: 3.1
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> 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, then +1
> localUnrebalancedPartitionsCount = for each partition: if stable key does not contain the local node, but pending key does, then +1
> ||Metric Name||Description||
> |localUnrebalancedPartitionsCount||
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