Gang scheduling.

[Egor Pahomov <pa...@gmail.com>]

Hi, I'm looking for library, which will allow me using gang scheduling in
yarn. I've read Twill code, but I couldn't find even creation of multiple
containers(not just one). Is this framework is right choice for my needs?

-- 



*Sincerely yoursEgor PakhomovScala Developer, Yandex*

Re: Gang scheduling.

[Alvin Wang <al...@continuuity.com>]

Using TwillApplication (instead of TwillRunnable), it's possible to run
TwillRunnables with multiple instances and also multiple groups of
TwillRunnables. Unfortunately, there isn't actually an example of this in
the twill-examples module (sorry).

Anyway, running this TwillApplication would run 4 containers for
HelloWorldRunnable and 2 containers for HelloWorld2Runnable:

public class HelloWorldApplication implements TwillApplication {

  @Override
  public TwillSpecification configure() {
    return TwillSpecification.Builder.with()
      .setName("HelloWorld")
      .withRunnable()
      .add("hello1", new HelloWorldRunnable(),
ResourceSpecification.Builder.with()
        .setVirtualCores(2)
        .setMemory(2, ResourceSpecification.SizeUnit.MEGA)
        .setInstances(4).build())
      .noLocalFiles()
      .add("hello2", new HelloWorld2Runnable(),
ResourceSpecification.Builder.with()
        .setVirtualCores(2)
        .setMemory(2, ResourceSpecification.SizeUnit.MEGA)
        .setInstances(2).build())
      .noLocalFiles()
      .anyOrder()
      .build();
  }
}


On Thu, Jul 17, 2014 at 5:01 AM, Egor Pahomov <pa...@gmail.com>
wrote:

> Hi, I'm looking for library, which will allow me using gang scheduling in
> yarn. I've read Twill code, but I couldn't find even creation of multiple
> containers(not just one). Is this framework is right choice for my needs?
>
> --
>
>
>
> *Sincerely yoursEgor PakhomovScala Developer, Yandex*
>

Re: Gang scheduling.

[Steve Loughran <st...@hortonworks.com>]

There's actually a JIRA to add this to YARN,
https://issues.apache.org/jira/browse/YARN-624  ...it really does need to
be done at the scheduler layer to prevent deadlocks...those are most likely
in smaller clusters where resource availability/turnover is lower


On 17 July 2014 13:01, Egor Pahomov <pa...@gmail.com> wrote:

> Hi, I'm looking for library, which will allow me using gang scheduling in
> yarn. I've read Twill code, but I couldn't find even creation of multiple
> containers(not just one). Is this framework is right choice for my needs?
>
> --
>
>
>
> *Sincerely yoursEgor PakhomovScala Developer, Yandex*
>

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