Mailing-List: contact hdfs-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-dev@hadoop.apache.org
Received-SPF: pass (athena.apache.org: domain of prvs=5965eb594=cbaker@sdl.com
 designates 65.100.157.33 as permitted sender)
Content-class: urn:content-classes:message
MIME-Version: 1.0
Subject: RE: Question about
Date: Wed, 12 Sep 2012 18:56:13 -0600
Message-ID: 
 <B34E9F024DB2F441879FDAE698E892A1012B5E1C@usmail0301.global.sdl.corp>
In-Reply-To: 
 <CADJZQ_2G7VsuxZW0Xxfah20-EBx2c0H=vhOAD6wE0Y2VDwG=5w@mail.gmail.com>
Thread-Topic: Question about
Thread-Index: Ac2RRDI+tRt06r/iTwexfzJokhf/igABAFOA
References: 
 <CADJZQ_2G7VsuxZW0Xxfah20-EBx2c0H=vhOAD6wE0Y2VDwG=5w@mail.gmail.com>
From: "Charles Baker" <cbaker@sdl.com>
To: <hdfs-dev@hadoop.apache.org>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Hi Vivian. Take a look at TextInputFormat and the RecordReader classes. This
is set via JobConf.setInputFormat().

-Chuck

-----Original Message-----
From: Vivi Lang [mailto:sqlxweiwei@gmail.com]=20
Sent: Wednesday, September 12, 2012 5:10 PM
To: hdfs-dev@hadoop.apache.org
Subject: Question about

Hi all,

Is there anyone who can tell me that when we lanuch a mapreduce task, for
example, wordcount, after the JobClient obtained the block locations (the
related hosts/datanodes are stored in the specified split), which
function/class will be called for reading those blocks from the datanode?

Thanks,
Vivian
SDL Enterprise Technologies, Inc. - all rights reserved.  The information c=
ontained in this email may be confidential and/or legally privileged. It ha=
s been sent for the sole use of the intended recipient(s). If you are not t=
he intended recipient of this mail, you are hereby notified that any unauth=
orized review, use, disclosure, dissemination, distribution, or copying of =
this communication, or any of its contents, is strictly prohibited. If you =
have received this communication in error, please reply to the sender and d=
estroy all copies of the message.
Registered address: 69 Hickory Drive, 3rd Floor, Waltham, MA 02451, USA