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https://issues.apache.org/jira/browse/YARN-111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13459420#comment-13459420
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nemon lou commented on YARN-111:
--------------------------------
to Harsh J
I have looked into the code.
CS's LeafQueue keeps active applications and pending applacations in TreeSet.
TreeSet's comparator comes from CapacityScheduler's applicationComparator .
ApplicationComparator's compare method is like this:
return a1.getApplicationId().getId() - a2.getApplicationId().getId();
(org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.java
line 106)
So application's priority doesn't take effect.Am i right?
to Robert
I'm not sure whether job priority is removed or not in recent MR1 code.But it
will be very nice of you to add application level priority in YARN. :)
> Application level priority in Resource Manager Schedulers
> ---------------------------------------------------------
>
> Key: YARN-111
> URL: https://issues.apache.org/jira/browse/YARN-111
> Project: Hadoop YARN
> Issue Type: Improvement
> Affects Versions: 2.0.1-alpha
> Reporter: nemon lou
>
> We need application level priority for Hadoop 2.0,both in FIFO scheduler and
> Capacity Scheduler.
> In Hadoop 1.0.x,job priority is supported.
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