[jira] [Updated] (HDDS-14018) Avoid repeated operations in SCMNodeManager#getNodeStatistics

["Attila Doroszlai (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-14018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Attila Doroszlai updated HDDS-14018:
------------------------------------
    Description: 
Possible improvements for {{SCMNodeManager#getNodeStatistics}}:

- avoid repeated {{getAllNodes()}} calls, store and reuse the list
- avoid repeated iteration of nodes for {{nodeStateStatistics}} (by each {{get...NodeCount()}} method)
- {{nodeUsageStatistics}} may base its calculations on values aggregated by {{nodeSpaceStatistics}} instead of iterating storage reports itself

  was:
Possible improvements for {{SCMNodeManager#getNodeStatistics}}:

- avoid repeated {{getAllNodes()}} calls, store and reuse the list
- each {{get...NodeCount()}} method called by {{nodeStateStatistics}} separately iterates nodes, filtering for the specific state
- {{nodeUsageStatistics}} may base its calculations on values aggregated by {{nodeSpaceStatistics}} instead of iterating storage reports itself


> Avoid repeated operations in SCMNodeManager#getNodeStatistics
> -------------------------------------------------------------
>
>                 Key: HDDS-14018
>                 URL: https://issues.apache.org/jira/browse/HDDS-14018
>             Project: Apache Ozone
>          Issue Type: Improvement
>          Components: SCM
>            Reporter: Attila Doroszlai
>            Assignee: Attila Doroszlai
>            Priority: Major
>
> Possible improvements for {{SCMNodeManager#getNodeStatistics}}:
> - avoid repeated {{getAllNodes()}} calls, store and reuse the list
> - avoid repeated iteration of nodes for {{nodeStateStatistics}} (by each {{get...NodeCount()}} method)
> - {{nodeUsageStatistics}} may base its calculations on values aggregated by {{nodeSpaceStatistics}} instead of iterating storage reports itself



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