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Posted to issues@ozone.apache.org by "Chu Cheng Li (Jira)" <ji...@apache.org> on 2025/06/14 09:36:00 UTC
[jira] [Updated] (HDDS-13054) [DiskBalancer] Stop DiskBalancer when DN enters DECOMMISSIONING or MAINTENANCE states
[ https://issues.apache.org/jira/browse/HDDS-13054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chu Cheng Li updated HDDS-13054:
--------------------------------
Status: Patch Available (was: Open)
> [DiskBalancer] Stop DiskBalancer when DN enters DECOMMISSIONING or MAINTENANCE states
> -------------------------------------------------------------------------------------
>
> Key: HDDS-13054
> URL: https://issues.apache.org/jira/browse/HDDS-13054
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Gargi Jaiswal
> Assignee: Gargi Jaiswal
> Priority: Major
> Labels: pull-request-available
>
> When DN enters in *{{DECOMMISSIONING}}* or *{{MAINTENANCE}}* states, DiskBalancer on that DN should be stopped and resume again after DN turns to normal state. This needs to be fixed.
> This JIRA will also tracks the addition of integration tests to validate DiskBalancer's behaviour when a DataNode (DN) transitions into *{{DECOMMISSIONING}}* or *{{MAINTENANCE}}* states.
> *Test Scenarios:* When DiskBalancer is running mark one DN as Decommissioned and other as Maintenance.
> *Setup:* Create a cluster with 5 DNs, each having multiple data volumes.
> *Description:* Start DiskBalancer on all DNs. While it's actively balancing, decommission one of the DNs and mark other DN state as Maintenance.
> *Expected Behaviour:*
> * Disk balancer should pause itself if the DN state is maintenance or decomissioning, decomissioned.
> * DN status marked as STOPPED and should not include the decommissioned DataNode in the output of diskbalancer status and report.
> * Other active DataNodes should continue balancing without disruption.
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