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Posted to issues@ozone.apache.org by "Gargi Jaiswal (Jira)" <ji...@apache.org> on 2025/09/15 06:54:00 UTC
[jira] [Updated] (HDDS-13611) [DiskBalancer] Inconsistent VolumeDataDensity calculations between SCM and DN and incorrect EstBytesToMove
[ https://issues.apache.org/jira/browse/HDDS-13611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gargi Jaiswal updated HDDS-13611:
---------------------------------
Status: Patch Available (was: In Progress)
> [DiskBalancer] Inconsistent VolumeDataDensity calculations between SCM and DN and incorrect EstBytesToMove
> ----------------------------------------------------------------------------------------------------------
>
> Key: HDDS-13611
> URL: https://issues.apache.org/jira/browse/HDDS-13611
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Gargi Jaiswal
> Assignee: Gargi Jaiswal
> Priority: Major
> Labels: pull-request-available
>
> This ticket fixes inconsistencies in *VolumeDataDensity* calculations between *SCM* and *DN* causing misleading reports.
> # Although *volumeDataDensity* for the datanode is *0.0* still it is started and showing containers moved.
> # *Estimated bytes moved and estimated time left* is 0 although it is moving containers.
> *Proposed Solution:*
> _VolumeDataDensity calculation (on SCM side in_ {{_*DiskBalancerManager*_}} {_}), EstimatedBytesToMove calculation should be aligned with DefaultVolumeChoosingPolicy calculation.{_}{*}{*}
> VolumeDataDensity calculation should be done on the DN side so that it considers all the ongoing operations and then correctly report it to the SCM.
> And this VolumeDataDensity calculation should be *standAlone utility on datanode side that can calculate VolumeDataDensity regardless of diskbalancer state (stopped or running)* .
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