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https://issues.apache.org/jira/browse/HDDS-400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16604611#comment-16604611
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Elek, Marton commented on HDDS-400:
-----------------------------------
I am OK with that.
But what about the new nodes? I guess we need to check the replicas not only if
the datanode becomes dead but in case of a new datanode appears on the stage.
(There could be over-replication).
How/where can it be handled? Do we need to check the replicas in case of the
first container report?
> Check global replication state of the reported containers on SCM
> ----------------------------------------------------------------
>
> Key: HDDS-400
> URL: https://issues.apache.org/jira/browse/HDDS-400
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: SCM
> Reporter: Elek, Marton
> Assignee: Elek, Marton
> Priority: Blocker
> Fix For: 0.2.1
>
> Attachments: HDDS-400.001.patch, HDDS-400.002.patch
>
>
> Current container replication handler compare the reported containers with
> the previous report. It handles over an under replicated state.
> But there is no logic to check the cluster-wide replication count. If a node
> is went down it won't be detected.
> For the sake of simplicity I would add this check to the
> ContainerReportHandler (as of now). So all the reported container should have
> enough replicas.
> We can check the performance implication with genesis, but as a first
> implementation I think it could be good enough.
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