[jira] [Commented] (KUDU-2084) Improve to increase/decrease the number of maps for MR/YARN job on Kudu

["Jean-Daniel Cryans (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KUDU-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16107513#comment-16107513 ] 

Jean-Daniel Cryans commented on KUDU-2084:
------------------------------------------

bq. Should we make improvement to let customer at lease able to decrease the mapper?

Not just a single's vendors customers but also every Kudu users :)

I think this could tie into our idea of having Scan Tokens that can be split into more chunks, something other frameworks can leverage too. [~danburkert], was there a jira for this?

> Improve to increase/decrease the number of maps for MR/YARN job on Kudu
> -----------------------------------------------------------------------
>
>                 Key: KUDU-2084
>                 URL: https://issues.apache.org/jira/browse/KUDU-2084
>             Project: Kudu
>          Issue Type: Improvement
>            Reporter: David Wang
>
> Right now, we can't increase/decrease the number of maps of MR/YARN job by below logical.
> https://github.com/cloudera/kudu/blob/branch-1.4.x/java/kudu-mapreduce/src/main/java/org/apache/kudu/mapreduce/KuduTableInputFormat.java#L137-L166
> Should we make improvement to let customer at lease able to decrease the mapper?



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