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https://issues.apache.org/jira/browse/EAGLE-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15029891#comment-15029891
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Zhao, Qingwen commented on EAGLE-57:
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If keeping topology.tesks unset, executor # will be equal to task # for a
bolt/spout
> Eagle should expose interface for user to set numTask for spout/bolt
> --------------------------------------------------------------------
>
> Key: EAGLE-57
> URL: https://issues.apache.org/jira/browse/EAGLE-57
> Project: Eagle
> Issue Type: Bug
> Reporter: Libin, Sun
> Fix For: 0.3.0
>
>
> storm provide interface for setting both parallelism hints(# storm executors)
> and # task for spout/bolt like the following
>
> {code:borderStyle=solid}
> topologyBuilder.setBolt("green-bolt", new GreenBolt(), 2)
> .setNumTasks(4)
> {code}
>
> But currently eagle only provide setting #parallelism for storm bolt/spout
> like:
> {code:borderStyle=solid}
> "parallelismConfig" : {
> "kafkaMsgConsumer" : 8
> }
> {code}
>
> We have not exposed #task settings for spout/bolt, user can only set topology
> level default #task in topology-storm.yaml like "topology.tasks: 8"
> This is not enough because each bolt/spout has different #parallelism, In
> most case, #parallelism should better equals to #task
> A bolt with #parallelism=1 #task=8 doesn't make sense for it's not efficient
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