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From "zhangshilong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7672) hadoop-sls can not simulate huge scale of YARN
Date Wed, 20 Dec 2017 09:55:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16298192#comment-16298192

zhangshilong commented on YARN-7672:

[~cxcw] I use two daemons deployed on different two hosts.
  I start 1000~5000 threads to simulate NM/AM,because I need to simulate 10000 apps running
with 10000 NM nodes.
one task use 1vcore and 2304Mb. And one NM has 50 vcore and 50*2304 Mb resources. 
All of NM and AM simulators are all cpu type of task.  So cpu.load will go up to 100+ (only
32 cores)  And as we know, Scheduler will also use one process for allocating resources.

> hadoop-sls can not simulate huge scale of YARN
> ----------------------------------------------
>                 Key: YARN-7672
>                 URL: https://issues.apache.org/jira/browse/YARN-7672
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: zhangshilong
>            Assignee: zhangshilong
>         Attachments: YARN-7672.patch
> Our YARN cluster scale to nearly 10 thousands nodes. We need to do scheduler pressure
> Using SLS,we start  2000+ threads to simulate NM and AM. But  cpu.load very high to 100+.
I thought that will affect  performance evaluation of scheduler. 
> So I thought to separate the scheduler from the simulator.
> I start a real RM. Then SLS will register nodes to RM,And submit apps to RM using RM

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