[jira] [Created] (HDDS-8931) Allow EC PipelineChoosingPolicy to be defined separately from Ratis

["Stephen O'Donnell (Jira)" <ji...@apache.org>]

Stephen O'Donnell created HDDS-8931:
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             Summary: Allow EC PipelineChoosingPolicy to be defined separately from Ratis
                 Key: HDDS-8931
                 URL: https://issues.apache.org/jira/browse/HDDS-8931
             Project: Apache Ozone
          Issue Type: Sub-task
          Components: SCM
            Reporter: Stephen O'Donnell
            Assignee: Stephen O'Donnell


Cluster may have set the PipelineChoosingPolicy to the HealthyPipelineChoosePolicy for Ratis, but it adds overhead and is not necessary for EC, as the EC pipeline is always healthy:

{code}
  public boolean isHealthy() {
    // EC pipelines are not reported by the DN and do not have a leader. If a
    // node goes stale or dead, EC pipelines will by closed like RATIS pipelines
    // but at the current time there are not other health metrics for EC.
    if (replicationConfig.getReplicationType() == ReplicationType.EC) {
      return true;
    }
    ...
{code}

To allow for flexibility, add a new config for the ECPipelineChoosingPolicy so it can be different from the Ratis policy. 



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