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Posted to dev@ambari.apache.org by "sam liu (JIRA)" <ji...@apache.org> on 2015/04/22 03:59:59 UTC

[jira] [Commented] (AMBARI-10645) Adjust block replication for clusters with less than 3 DataNodes

    [ https://issues.apache.org/jira/browse/AMBARI-10645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14506242#comment-14506242 ] 

sam liu commented on AMBARI-10645:
----------------------------------

Could any expert please help assign this jira to me? I already made a patch and did necessary tests to ensure it works as expectation. So I attach the patch here and also opened a review request: #33428 .

Thanks!

> Adjust block replication for clusters with less than 3 DataNodes
> ----------------------------------------------------------------
>
>                 Key: AMBARI-10645
>                 URL: https://issues.apache.org/jira/browse/AMBARI-10645
>             Project: Ambari
>          Issue Type: Improvement
>          Components: ambari-server
>    Affects Versions: 2.2.0
>            Reporter: sam liu
>         Attachments: AMBARI-10645-001.patch
>
>
> When we install on a cluster with less than 3 DataNodes, the replication factor is set to 3 anyway. It does not make sense. We should change this value to a lower number  to avoid missing replicas(for example, if there is just one DN, set the replication factor to 1).



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