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https://issues.apache.org/jira/browse/YARN-568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661691#comment-13661691
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Bikas Saha commented on YARN-568:
---------------------------------
>From the code in generatePreemptionMessage() the overlap between strict and
>fungible is not obvious. Can both be sent?
{code}
+ private PreemptionMessage generatePreemptionMessage(Allocation allocation){
{code}
Unused new member seems to have been added: recordFactory?
{code}
public class Allocation {
+
+ private final RecordFactory recordFactory =
+ RecordFactoryProvider.getRecordFactory(null);
+
{code}
> FairScheduler: support for work-preserving preemption
> ------------------------------------------------------
>
> Key: YARN-568
> URL: https://issues.apache.org/jira/browse/YARN-568
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler
> Reporter: Carlo Curino
> Assignee: Carlo Curino
> Fix For: 2.0.5-beta
>
> Attachments: YARN-568-1.patch, YARN-568-2.patch, YARN-568-2.patch,
> YARN-568.patch, YARN-568.patch
>
>
> In the attached patch, we modified the FairScheduler to substitute its
> preemption-by-killling with a work-preserving version of preemption (followed
> by killing if the AMs do not respond quickly enough). This should allows to
> run preemption checking more often, but kill less often (proper tuning to be
> investigated). Depends on YARN-567 and YARN-45, is related to YARN-569.
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