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https://issues.apache.org/jira/browse/HDDS-15014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang reassigned HDDS-15014:
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Assignee: Wei-Chiu Chuang
> Speed up EC container decommission
> ----------------------------------
>
> Key: HDDS-15014
> URL: https://issues.apache.org/jira/browse/HDDS-15014
> Project: Apache Ozone
> Issue Type: Epic
> Components: SCM
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Major
>
> When Ozone decommission a datanode, it must wait until all containers are
> fully replicated to other datanodes in the cluster.
>
> In the case of EC containers, instead of reconstructing the block, it
> replicates to a destination. That replication becomes a bottleneck because it
> doesn't matter how big the cluster is, the container block is always
> replicated from the same source (the decommissioning datanode)
>
> Solution: keep doing replication, but when there are too many containers
> pending, do reconstruction instead. Reconstruction leverages other datanodes
> in the cluster so it increases parallelism.
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