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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXCORE-10) Enable non-affinity of operators per node (not containers)
Date Thu, 07 Apr 2016 18:20:25 GMT

    [ https://issues.apache.org/jira/browse/APEXCORE-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15230756#comment-15230756
] 

ASF GitHub Bot commented on APEXCORE-10:
----------------------------------------

Github user tweise commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-core/pull/250#discussion_r58919720
  
    --- Diff: engine/src/main/java/com/datatorrent/stram/StreamingAppMasterService.java ---
    @@ -750,6 +752,11 @@ private void execute() throws YarnException, IOException
             expiryTime = StramUserLogin.refreshTokens(tokenLifeTime, FileUtils.getTempDirectoryPath(),
applicationId, conf, hdfsKeyTabFile, credentials, rmAddress, true);
           }
     
    +      if (System.currentTimeMillis() > nodeReportUpdateTime) {
    --- End diff --
    
    Still see System.currentTimeMillis repeated within the loop. Please make a final variable
out of it.


> Enable non-affinity of operators per node (not containers)
> ----------------------------------------------------------
>
>                 Key: APEXCORE-10
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-10
>             Project: Apache Apex Core
>          Issue Type: Task
>            Reporter: Amol Kekre
>            Assignee: Isha Arkatkar
>              Labels: roadmap
>
> The issue happens on cloud which provides virtual cores with software like Xen underneath.
In effect if CPU intensive operators land up on same node we have a resource bottleneck,
> Need to create an attribute that does the following
> - Operators A & B should not be on same node
> - Stram should use this attribute to try to get containers on different node
> It is understood that the user is making an explicit choice to use NIC instead of stream
local optimization



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