Shilun Fan created HDDS-11843:
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Summary: Enhance DataNodeSafeModeRule to Use Pipeline DN List
Key: HDDS-11843
URL: https://issues.apache.org/jira/browse/HDDS-11843
Project: Apache Ozone
Issue Type: Improvement
Components: SCM
Reporter: Shilun Fan
Assignee: Shilun Fan
Currently, the *DataNodeSafeModeRule* in SCM requires users to manually
configure the number of DataNodes in the cluster using the setting
{{{}hdds.scm.safemode.min.datanode{}}}, with a default value of 1. If not
configured, this value defaults to 1. However, since clusters are frequently
scaled and the number of active DataNodes is uncertain, relying on a fixed
value to determine whether SafeMode conditions are met is not reliable.
To address this issue, we propose a new rule: allowing *DataNodeSafeModeRule*
to retrieve the DataNode list from the registered Pipeline and use a
configurable ratio to dynamically calculate the required number of DataNodes.
This will provide a more accurate way to determine when the system can exit
SafeMode.
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