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From "daemon (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (YARN-6769) Put the no demand queue after the most in FairSharePolicy#compare
Date Fri, 07 Jul 2017 03:23:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-6769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

daemon updated YARN-6769:
-------------------------
    Comment: was deleted

(was: diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
index f8cdb45929..e930b80e45 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
@@ -79,6 +79,19 @@ public String getName() {
 
     @Override
     public int compare(Schedulable s1, Schedulable s2) {
+      Resource demand1 = s1.getDemand();
+      Resource demand2 = s2.getDemand();
+      // Put the schedulable which does not require resource to
+      // the end. So the other schedulable can get resource as soon as
+      // possible though it use resource greater then it minShare or demand.
+      if (demand1.equals(Resources.none()) &&
+          !demand2.equals(Resources.none())) {
+        return 1;
+      } else if (demand2.equals(Resources.none()) &&
+          !demand1.equals(Resources.none())) {
+        return -1;
+      }
+      
       double minShareRatio1, minShareRatio2;
       double useToWeightRatio1, useToWeightRatio2;
       double weight1, weight2;
@@ -86,9 +99,9 @@ public int compare(Schedulable s1, Schedulable s2) {
       Resource resourceUsage1 = s1.getResourceUsage();
       Resource resourceUsage2 = s2.getResourceUsage();
       Resource minShare1 = Resources.min(RESOURCE_CALCULATOR, null,
-          s1.getMinShare(), s1.getDemand());
+          s1.getMinShare(), demand1);
       Resource minShare2 = Resources.min(RESOURCE_CALCULATOR, null,
-          s2.getMinShare(), s2.getDemand());
+          s2.getMinShare(), demand2);
       boolean s1Needy = Resources.lessThan(RESOURCE_CALCULATOR, null,
           resourceUsage1, minShare1);
       boolean s2Needy = Resources.lessThan(RESOURCE_CALCULATOR, null,
)

> Put the no demand queue after the most in FairSharePolicy#compare
> -----------------------------------------------------------------
>
>                 Key: YARN-6769
>                 URL: https://issues.apache.org/jira/browse/YARN-6769
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.7.2
>            Reporter: daemon
>            Priority: Minor
>             Fix For: 2.9.0
>
>
> When use fairsheduler as RM scheduler, before assign container we will sort all queues
or applications. 
> We will use FairSharePolicy#compare as the comparator´╝î but the comparator is not so
perfect.
> It have a problem as blow:
> 1. when a queue use resource over minShare(minResources), it will put behind the queue
whose demand is zeor.
> so it will greater opportunity to get the resource although it do not want. It will waste
schedule time when assign container
> to queue or application.
> I have fix it, and I will upload the patch to the jira.



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