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From: Kapil Mehrotra <kapil.mehrotra@apollomunichinsurance.com>
To: "general@hadoop.apache.org" <general@hadoop.apache.org>
Date: Wed, 16 Oct 2013 11:41:13 +0530
Subject: RE: Apache Hadoop 2.x is now GA with release of hadoop-2.2.0
Thread-Topic: Apache Hadoop 2.x is now GA with release of hadoop-2.2.0
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Congratulations Arun....

_____________________________________________________________________
Kapil Mehrotra
Apollo Munich Health Insurance Company Limited
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-----Original Message-----
From: Arun C Murthy [mailto:acm@hortonworks.com]
Sent: 16 October 2013 11:19
To: general@hadoop.apache.org
Subject: Apache Hadoop 2.x is now GA with release of hadoop-2.2.0

All,

 I'm very happy announce that the Apache Hadoop community has released hado=
op-2.2.0, the *GA* release of Apache Hadoop 2.x!

 Users are encouraged to immediately move to 2.2.0 since this release is si=
gnificantly more stable and is guaranteed to remain compatible in terms of =
both APIs and protocols.

 To recap, this release has a number of significant highlights compared to =
Hadoop 1.x:
        * YARN - A general purpose resource management system for Hadoop to=
 allow MapReduce and other other data processing frameworks and services
        * High Availability for HDFS
        * HDFS Federation
        * HDFS Snapshots
        * NFSv3 access to data in HDFS
        * Support for running Hadoop on Microsoft Windows
        * Binary Compatibility for MapReduce applications built on hadoop-1=
.x
        * Substantial amount of integration testing with rest of projects i=
n the ecosystem

 Please see the Hadoop 2.2.0 Release Notes for details.

 Congratulations to the entire community, this is a big deal!

thanks,
Arun

P.S.: A couple of important points to note while upgrading to hadoop-2.2.0:
* HDFS - The HDFS community decided to push the symlinks feature out to a f=
uture 2.3.0 release and is currently disabled.
* YARN/MapReduce - Users need to change ShuffleHandler service name from ma=
preduce.shuffle to mapreduce_shuffle.


--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/


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