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Posted to hdfs-dev@hadoop.apache.org by "Bharat Viswanadham (JIRA)" <ji...@apache.org> on 2019/02/26 23:45:00 UTC

[jira] [Created] (HDDS-1182) Pipeline Rule where atleast one datanode is reported in the pipeline

Bharat Viswanadham created HDDS-1182:
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             Summary: Pipeline Rule where atleast one datanode is reported in the pipeline
                 Key: HDDS-1182
                 URL: https://issues.apache.org/jira/browse/HDDS-1182
             Project: Hadoop Distributed Data Store
          Issue Type: Bug
            Reporter: Bharat Viswanadham
            Assignee: Bharat Viswanadham


h2. Pipeline Rule with configurable percentage of pipelines with at least one datanode reported:

In this rule we consider when at least  90% of pipelines have at least one datanode reported. 

 

This rule satisfies, when we exit chill mode, Ozone clients will have at least one open replica for reads to succeed. (We can increase this threshold default from 90%, if we want to see fewer failures during reads after exit chill mode.



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