Return-Path: 
 <user-return-13956-apmail-hadoop-user-archive=hadoop.apache.org@hadoop.apache.org>
X-Original-To: apmail-hadoop-user-archive@minotaur.apache.org
Delivered-To: apmail-hadoop-user-archive@minotaur.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 0D59C10B43
	for <apmail-hadoop-user-archive@minotaur.apache.org>;
 Wed, 26 Feb 2014 21:39:55 +0000 (UTC)
Received: (qmail 21558 invoked by uid 500); 26 Feb 2014 21:39:43 -0000
Delivered-To: apmail-hadoop-user-archive@hadoop.apache.org
Received: (qmail 21472 invoked by uid 500); 26 Feb 2014 21:39:42 -0000
Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:user-help@hadoop.apache.org>
List-Unsubscribe: <mailto:user-unsubscribe@hadoop.apache.org>
List-Post: <mailto:user@hadoop.apache.org>
List-Id: <user.hadoop.apache.org>
Reply-To: user@hadoop.apache.org
Delivered-To: mailing list user@hadoop.apache.org
Received: (qmail 21465 invoked by uid 99); 26 Feb 2014 21:39:42 -0000
Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 26 Feb 2014 21:39:42 +0000
X-ASF-Spam-Status: No, hits=2.2 required=5.0
	tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (nike.apache.org: domain of a.aboelela@gmail.com designates
 209.85.192.173 as permitted sender)
Received: from [209.85.192.173] (HELO mail-pd0-f173.google.com)
 (209.85.192.173)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 26 Feb 2014 21:39:35 +0000
Received: by mail-pd0-f173.google.com with SMTP id z10so1502686pdj.4
        for <user@hadoop.apache.org>; Wed, 26 Feb 2014 13:39:14 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        bh=OcbOnzYrLuC/nazX08vR4fsluRmt4FPXzO7HhWPTw5Y=;
        b=oAvi71akckO89bBzlO62Fg2yszqFYdeWakYBCCn/ISsh8TTzhw3cGEceZXF5Sa7RbS
         EUbD0B8t66+9wWIpKHZ91wskH7wiVSA4zEhIQIBRzuG9OfeM0OJOZ51bzHDMY77yrLt2
         V06Rlh1h1bQIu1L8VKy3UXyVYl2F4Cc5HvJEuM+O196AX/cNy9iSdlS3ttm096nof8no
         iJ0LqHThpRbqqovieyLuH/NsPlmVa2XrHtRekqb7InlP16ljMhzyR8CvfuVKGEVDzS4C
         OjkJ+AuRqGrtMqLXirxlF1w/jRgOuuEYPWTjsTMGVxg1Q3quwYHD7OCBbkbRnC+8yI7t
         DwzA==
MIME-Version: 1.0
X-Received: by 10.66.231.74 with SMTP id te10mr11163763pac.37.1393450754140;
 Wed, 26 Feb 2014 13:39:14 -0800 (PST)
Received: by 10.68.47.37 with HTTP; Wed, 26 Feb 2014 13:39:14 -0800 (PST)
In-Reply-To: <1AE7A4B3-1865-4E57-9B06-7631C2B3AC9D@gmail.com>
References: <1AE7A4B3-1865-4E57-9B06-7631C2B3AC9D@gmail.com>
Date: Wed, 26 Feb 2014 13:39:14 -0800
Message-ID: 
 <CAGTgwoS3m_nzJdvywnOd5F1OnfKV=LbKU-SOKvr7=12hNEjjbg@mail.gmail.com>
Subject: Re: Old vs new MR API
From: Ahmed Radwan <a.aboelela@gmail.com>
To: user@hadoop.apache.org
Content-Type: multipart/alternative; boundary=047d7b15a21f3670f704f35609c8
X-Virus-Checked: Checked by ClamAV on apache.org

--047d7b15a21f3670f704f35609c8
Content-Type: text/plain; charset=ISO-8859-1

Old vs new MR APIs refers to changes from org.apache.hadoop.mapred to
org.apache.hadoop.mapreduce packages which are changes in how you construct
your job, mappers, reducers, etc.

This is not related to Yarn/MR2 which generally refers to new Hadoop 2
design where there is separation between resource management (handled by
yarn) and application life cycle management (handled by application
master). Just google yarn and you'll find a lot of docs and blog posts
describing these details.

Best Regards
Ahmed


On Wed, Feb 26, 2014 at 1:26 PM, Marco Shaw <marco.shaw@gmail.com> wrote:

> Tom White's Hadoop book refers to old vs new MR APIs.
>
> Is this strictly a MR1 vs MR2 (YARN) comparison, or something before MR2?
>



-- 
Ahmed

--047d7b15a21f3670f704f35609c8
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Old vs new MR APIs refers to changes from org.apache.hadoo=
p.mapred to org.apache.hadoop.mapreduce packages which are changes in how y=
ou construct your job, mappers, reducers, etc.<div><br></div><div>This is n=
ot related to Yarn/MR2 which generally refers to new Hadoop 2 design where =
there is separation between resource management (handled by yarn) and appli=
cation life cycle management (handled by application master). Just google y=
arn and you&#39;ll find a lot of docs and blog posts describing these detai=
ls.</div>
<div><br></div><div>Best Regards</div><div>Ahmed</div>
<div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Wed, Feb 2=
6, 2014 at 1:26 PM, Marco Shaw <span dir=3D"ltr">&lt;<a href=3D"mailto:marc=
o.shaw@gmail.com" target=3D"_blank">marco.shaw@gmail.com</a>&gt;</span> wro=
te:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Tom White&#39;s Hadoop book refers to old vs=
 new MR APIs.<br>
<br>
Is this strictly a MR1 vs MR2 (YARN) comparison, or something before MR2?<b=
r>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>Ahmed
</div></div>

--047d7b15a21f3670f704f35609c8--