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From: "Kartashov, Andy" <Andy.Kartashov@mpac.ca>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
Subject: RE: Differences between YARN and Hadoop
Thread-Topic: Differences between YARN and Hadoop
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Date: Mon, 22 Oct 2012 14:32:04 +0000
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 Thanks Harsh,

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

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 y=
et, and it could potentially change in non-backwards-compatible ways. Cloud=
era recommends that you use MRv1 unless you have particular reasons for usi=
ng 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 differenc=
e:
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> w=
rote:
> They are not comparable.
>
> YARN also known as MRv2 is the newer version of MapReduce also known as M=
Rv1.
>
>
>
>
> -----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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l


--
Harsh J
NOTICE: This e-mail message and any attachments are confidential, subject t=
o copyright and may be privileged. Any unauthorized use, copying or disclos=
ure is prohibited. If you are not the intended recipient, please delete and=
 contact the sender immediately. Please consider the environment before pri=
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 l'accompagne sont confidentiels, prot=E9g=E9s par le droit d'auteur et peu=
vent =EAtre couverts par le secret professionnel. Toute utilisation, copie =
ou divulgation non autoris=E9e est interdite. Si vous n'=EAtes pas le desti=
nataire pr=E9vu de ce courriel, supprimez-le et contactez imm=E9diatement l=
'exp=E9diteur. Veuillez penser =E0 l'environnement avant d'imprimer le pr=
=E9sent courriel