Return-Path: X-Original-To: apmail-hadoop-common-user-archive@www.apache.org Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id B23897308 for ; Tue, 20 Sep 2011 15:38:48 +0000 (UTC) Received: (qmail 21893 invoked by uid 500); 20 Sep 2011 15:38:45 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 21850 invoked by uid 500); 20 Sep 2011 15:38:45 -0000 Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-user@hadoop.apache.org Delivered-To: mailing list common-user@hadoop.apache.org Received: (qmail 21842 invoked by uid 99); 20 Sep 2011 15:38:45 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 20 Sep 2011 15:38:45 +0000 X-ASF-Spam-Status: No, hits=2.9 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [65.55.90.209] (HELO snt0-omc4-s6.snt0.hotmail.com) (65.55.90.209) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 20 Sep 2011 15:38:37 +0000 Received: from SNT113-W30 ([65.55.90.199]) by snt0-omc4-s6.snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Tue, 20 Sep 2011 08:38:14 -0700 Message-ID: X-Message-Routing: QnP77rBC18BTqDG5auZVIFk4hu61lCRKgtclzzrW2qR/8tk0htJNPYKN4e0cEbNTsYKy5E4Ajyx0K9zfoNu8EsXv83oslekQZ3d6ho9lwtl3HV21i+OLdSswpeokFrLBq7yW6uz8958h9kRM= Content-Type: multipart/alternative; boundary="_41a33f79-5ca8-468f-873b-ab269dbaf42e_" X-Originating-IP: [129.108.202.58] From: Daniel Yehdego To: Subject: RE: Reducer to concatenate string values Date: Tue, 20 Sep 2011 15:38:11 +0000 Importance: Normal In-Reply-To: References: ,<1316498086.61449.YahooMailNeo@web110509.mail.gq1.yahoo.com>, MIME-Version: 1.0 X-OriginalArrivalTime: 20 Sep 2011 15:38:14.0182 (UTC) FILETIME=[4F61BC60:01CC77AB] X-Virus-Checked: Checked by ClamAV on apache.org --_41a33f79-5ca8-468f-873b-ab269dbaf42e_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Ayon=2C=20 any idea on my previous question? Regards=2C=20 Daniel T. Yehdego Computational Science Program=20 University of Texas at El Paso=2C UTEP=20 dtyehdego@miners.utep.edu > From: dtyehdego@miners.utep.edu > To: common-user@hadoop.apache.org > Subject: RE: Reducer to concatenate string values > Date: Tue=2C 20 Sep 2011 06:06:22 +0000 >=20 >=20 > Hi Ayon=2C=20 > I am using a C executable as my mapper (streaming)=2C but I am not sure h= ow to use a reducer that concatenates the values from a mapper in order.=20 >=20 > Regards=2C=20 >=20 > Daniel T. Yehdego > Computational Science Program=20 > University of Texas at El Paso=2C UTEP=20 > dtyehdego@miners.utep.edu >=20 > > Date: Mon=2C 19 Sep 2011 22:54:46 -0700 > > From: ayonsinha@yahoo.com > > Subject: Re: Reducer to concatenate string values > > To: common-user@hadoop.apache.org > >=20 > > What are you using for your map/reduce? Streaming/Java/Pig/Hive? > > =20 > > -Ayon > > See My Photos on Flickr > > Also check out my Blog for answers to commonly asked questions. > >=20 > >=20 > >=20 > > ________________________________ > > From: Daniel Yehdego > > To: common-user@hadoop.apache.org > > Sent: Monday=2C September 19=2C 2011 10:43 PM > > Subject: Reducer to concatenate string values > >=20 > >=20 > > Good evening=2C=20 > > I have a certain value output from a mapper and I want to concatenate t= he string outputs using a Reducer (one reducer).But the order of the concat= enated string values is not in order. How can I use a reducer that receives= a value from a mapper output and concatenate the strings in order. waiting= your response and thanks in advance. =20 > >=20 > > Regards=2C=20 > >=20 > > Daniel T. Yehdego > > Computational Science Program=20 > > University of Texas at El Paso=2C UTEP=20 > > dtyehdego@miners.utep.edu =20 > =20 = --_41a33f79-5ca8-468f-873b-ab269dbaf42e_--