[
https://issues.apache.org/jira/browse/HBASE-1672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12733774#action_12733774
]
stack commented on HBASE-1672:
------------------------------
So, what is the indicator in the MR UI measuring? TT+DN locality? Or is it
TT+RS? If the latter, and we are only 10% of the time doing TT mapper local to
the region hosting server, then our TT+RS locality would seem to be broke -- or
ineffective (either would be good to know).
> Map tasks not local to RS
> -------------------------
>
> Key: HBASE-1672
> URL: https://issues.apache.org/jira/browse/HBASE-1672
> Project: Hadoop HBase
> Issue Type: Bug
> Components: mapred, master, regionserver
> Affects Versions: 0.20.0, 0.19.3
> Environment: DN, TT and RS running on the same nodes.
> Reporter: Amandeep Khurana
> Fix For: 0.20.0, 0.19.4
>
>
> The number of data local map tasks while scanning a table is only about 10%
> of the total map tasks...
> My table had 280 regions and 13M records... The number of map tasks in the
> scan job were equal to the number of regions (280). Only 25 of them were data
> local tasks.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
