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From "Kartashov, Andy" <Andy.Kartas...@mpac.ca>
Subject RE: Differences between YARN and Hadoop
Date Mon, 22 Oct 2012 14:32:04 GMT
 Thanks Harsh,

I have been playing with MapReduce v2 (YARN) in pseudo-dist mode and are trying to deploy
it now on a cluster. This is what I came across on CD4 website:

Is this an up-to-date note? Shall I switch to MapReducev1 (MRv1) instead?

QTE
Note: Cloudera does not consider the current upstream MRv2 release stable yet, and it could
potentially change in non-backwards-compatible ways. Cloudera recommends that you use MRv1
unless you have particular reasons for using MRv2, which should not be considered production-ready.
UNQTE

-----Original Message-----
From: Harsh J [mailto:harsh@cloudera.com]
Sent: Friday, October 19, 2012 1:34 AM
To: user@hadoop.apache.org
Subject: Re: Differences between YARN and Hadoop

Andy,

"YARN" is NOT "MRv2". That seems to be a major confusion with people thanks to everyone mixing
up the terms. See this small post for a clear difference:
http://www.cloudera.com/blog/2012/10/mr2-and-yarn-briefly-explained/

On Fri, Oct 19, 2012 at 3:30 AM, Kartashov, Andy <Andy.Kartashov@mpac.ca> wrote:
> They are not comparable.
>
> YARN also known as MRv2 is the newer version of MapReduce also known as MRv1.
>
>
>
>
> -----Original Message-----
> From: Tom Brown [mailto:tombrown52@gmail.com]
> Sent: Thursday, October 18, 2012 4:33 PM
> To: user@hadoop.apache.org
> Subject: Differences between YARN and Hadoop
>
> To all,
>
> I have a few questions regarding YARN (with respect to Hadoop):
>
> Are YARN and Hadoop separate, or is YARN the successor to Hadoop?
>
> What are the major conceptual differences between YARN and Hadoop?
>
> I have further questions, but they may or may not make sense depending on the answers
to the above.
>
> Thanks in advance!
>
> Tom Brown
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--
Harsh J
NOTICE: This e-mail message and any attachments are confidential, subject to copyright and
may be privileged. Any unauthorized use, copying or disclosure is prohibited. If you are not
the intended recipient, please delete and contact the sender immediately. Please consider
the environment before printing this e-mail. AVIS : le présent courriel et toute pièce jointe
qui l'accompagne sont confidentiels, protégés par le droit d'auteur et peuvent être couverts
par le secret professionnel. Toute utilisation, copie ou divulgation non autorisée est interdite.
Si vous n'êtes pas le destinataire prévu de ce courriel, supprimez-le et contactez immédiatement
l'expéditeur. Veuillez penser à l'environnement avant d'imprimer le présent courriel

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