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Posted to issues@ozone.apache.org by "Neil Joshi (Jira)" <ji...@apache.org> on 2022/09/27 18:20:00 UTC

[jira] [Commented] (HDDS-7265) ScatterRackPolicy for Ratis container placement behaves like RackAware policy

    [ https://issues.apache.org/jira/browse/HDDS-7265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17610188#comment-17610188 ] 

Neil Joshi commented on HDDS-7265:
----------------------------------

cc [~prashantpogde] [~swagle],  as we discussed in the recent sync meeting. 

> ScatterRackPolicy for Ratis container placement behaves like RackAware policy
> -----------------------------------------------------------------------------
>
>                 Key: HDDS-7265
>                 URL: https://issues.apache.org/jira/browse/HDDS-7265
>             Project: Apache Ozone
>          Issue Type: Bug
>            Reporter: Neil Joshi
>            Priority: Major
>
> We expected container placement for ratis containers under the SCMContainerPlacementRackScatter to behave as documented for EC.  Instead, we find when we configure ozone to use the SCMContainerPlacementRackScatter for ratis container placement, the placement behaves like the SCMContainerPlacementRackAware. 
> That is, for a cluster with 3 racks and Datanodes on each of the racks, with a RATIS 3 configuration, to have pipelines and containers placed on each of the 3 racks.  Instead we find that pipelines and containers are placed like SCMContainerPlacementRackAware with 2 on one rack and 1 on another rack. 



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