[jira] [Updated] (HDDS-5728) ContainerBalancer should use remaining space to calculate utilization.

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-5728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HDDS-5728:
---------------------------------
    Labels: pull-request-available  (was: )

> ContainerBalancer should use remaining space to calculate utilization.
> ----------------------------------------------------------------------
>
>                 Key: HDDS-5728
>                 URL: https://issues.apache.org/jira/browse/HDDS-5728
>             Project: Apache Ozone
>          Issue Type: Sub-task
>          Components: SCM
>            Reporter: Siddhant Sangwan
>            Assignee: Siddhant Sangwan
>            Priority: Major
>              Labels: pull-request-available
>
> ContainerBalancer gets a list of datanodes sorted according to their utilizations using NodeManager#getMostOrLeastUsedDatanodes.
> There are two ways of calculating utilization:
>  # {{used space / capacity}}
>  # {{(capacity - remaining) / capacity}}
> {{Used}} space is obtained using the DU or DF command (SpaceUsageSource), while {{remaining}} can either be {{capacity - used}} or calculated using the java.io.File#getUsableSpace method. This means the two ways of calculating utilization might give different results (when {{used}} is not equal to {{capacity - remaining}}).
> Currently, NodeManager#getMostOrLeastUsed uses method 2 while balancer uses method 1.
>  Instead, both should consistently use the same approach. We prefer method 2 since the {{remaining}} space calculation will also account for space used by processes other than Ozone. See the documentation in VolumeInfo for further details on calculating {{remaining}} space.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@ozone.apache.org
For additional commands, e-mail: issues-help@ozone.apache.org