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https://issues.apache.org/jira/browse/HAWQ-560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203147#comment-15203147
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Alexander Denissov commented on HAWQ-560:
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Since we expose it in Ambari, we put the calculations in Ambari side. I would
assume if the GUC is set in hdfs-client.xml by Ambari, you will not
re-calculate it on the backend, correct ?
You can also do calculations on the backend side in case users do not use
Ambari. Let's use the same number -- set to false if # of segments is 4 or less
( <5 ).
> Set 'output.replace-datanode-on-failure' depend on datanodes number
> -------------------------------------------------------------------
>
> Key: HAWQ-560
> URL: https://issues.apache.org/jira/browse/HAWQ-560
> Project: Apache HAWQ
> Issue Type: New Feature
> Components: Command Line Tools
> Reporter: Radar Lei
> Assignee: Radar Lei
>
> Set 'output.replace-datanode-on-failure' depend on datanode number.
> By default, we should set this value while hawq cluster init. To set this
> value automatically, we assume segment number is the same as datanode number.
> When datanodes < 4, change the default value from true to false.
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