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https://issues.apache.org/jira/browse/HDFS-1547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973401#action_12973401
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Suresh Srinivas commented on HDFS-1547:
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> decommmision-in-progress: decommissioning has started at the datanode.
> Namenode sends this state to the datanodes. Datanodes reduce frequency of
> heartbeats to Max(heartbeat time, datanode expiry time/2)?
Forgot to make the change in the earlier comment. Reduced frequency of
heartbeats will only be done in decommissioned state. These optimizations are
optional.
> Improve decommission mechanism
> ------------------------------
>
> Key: HDFS-1547
> URL: https://issues.apache.org/jira/browse/HDFS-1547
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Fix For: 0.23.0
>
>
> Current decommission mechanism driven using exclude file has several issues.
> This bug proposes some changes in the mechanism for better manageability. See
> the proposal in the next comment for more details.
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