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Posted to mapreduce-dev@hadoop.apache.org by Suresh S <su...@gmail.com> on 2014/01/25 18:47:04 UTC

Doubt in Yarn Scheduler.

Hello Friends,

         I have the following doubts.

Is the schedulers(Capacity Scheduler, Fair Scheduler, etc ) used in MR 1.x
are compatible with 2.x ?

If it is not compatible means, what are the
changes/modifications/difference between them?

I am working to implement a modified delay scheduling in HFS for 1.x
version.
How it could be modified for 2.x versions?

What about Speculative Execution in MRv2. Is the any changes?

Help me in this regard. Thanks in advance.

*Regards*
*S.Suresh,*
*+91-9941506562*

Re: Doubt in Yarn Scheduler.

Posted by Sandy Ryza <sa...@cloudera.com>.

Hi Suresh,

The schedulers used in MR1 are not compatible with the schedulers used in
MR2 / YARN.  Check out ResourceScheduler.java for the updated interface.

I believe that speculative execution still works the same way.

-Sandy

On Sat, Jan 25, 2014 at 9:47 AM, Suresh S <su...@gmail.com> wrote:

> Hello Friends,
>
>          I have the following doubts.
>
> Is the schedulers(Capacity Scheduler, Fair Scheduler, etc ) used in MR 1.x
> are compatible with 2.x ?
>
> If it is not compatible means, what are the
> changes/modifications/difference between them?
>
> I am working to implement a modified delay scheduling in HFS for 1.x
> version.
> How it could be modified for 2.x versions?
>
> What about Speculative Execution in MRv2. Is the any changes?
>
> Help me in this regard. Thanks in advance.
>
> *Regards*
> *S.Suresh,*
> *+91-9941506562*
>