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From "Bharat Viswanadham (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HDDS-1182) Pipeline Rule where atleast one datanode is reported in the pipeline
Date Tue, 26 Feb 2019 23:47:00 GMT

     [ https://issues.apache.org/jira/browse/HDDS-1182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HDDS-1182 started by Bharat Viswanadham.
------------------------------------------------
> 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
>          Components: SCM
>            Reporter: Bharat Viswanadham
>            Assignee: Bharat Viswanadham
>            Priority: Major
>
> 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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