[jira] [Commented] (HDDS-7506) Expose more snapshot metrics under OMMetrics

["Christos Bisias (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDDS-7506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17654480#comment-17654480 ] 

Christos Bisias commented on HDDS-7506:
---------------------------------------

[~smeng] The number of active snapshots can't be a counter because the status might change to deleted or reclaimed and the metric should be able to keep up with the change.

The best way seems to go over the snapshot table and check the status for every snapshot and then update the metrics. That would be done during OM startup but counting the number of active snapshots just for the metrics, seems like an unnecessary load for the system.

What do you think?

> Expose more snapshot metrics under OMMetrics
> --------------------------------------------
>
>                 Key: HDDS-7506
>                 URL: https://issues.apache.org/jira/browse/HDDS-7506
>             Project: Apache Ozone
>          Issue Type: Sub-task
>            Reporter: Siyao Meng
>            Assignee: Christos Bisias
>            Priority: Major
>
> Investigate and add any missing snapshot metrics that are useful to the end user or monitoring agents. See {{OMMetrics}}.
> Related discussion on another PR: https://github.com/apache/ozone/pull/3784#discussion_r1025882801



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