Return-Path: X-Original-To: apmail-hadoop-common-dev-archive@www.apache.org Delivered-To: apmail-hadoop-common-dev-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 61B0D9BBE for ; Sat, 26 Nov 2011 13:03:56 +0000 (UTC) Received: (qmail 5555 invoked by uid 500); 26 Nov 2011 13:03:55 -0000 Delivered-To: apmail-hadoop-common-dev-archive@hadoop.apache.org Received: (qmail 5488 invoked by uid 500); 26 Nov 2011 13:03:54 -0000 Mailing-List: contact common-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-dev@hadoop.apache.org Delivered-To: mailing list common-dev@hadoop.apache.org Received: (qmail 5480 invoked by uid 500); 26 Nov 2011 13:03:54 -0000 Delivered-To: apmail-hadoop-core-dev@hadoop.apache.org Received: (qmail 5477 invoked by uid 99); 26 Nov 2011 13:03:54 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 26 Nov 2011 13:03:54 +0000 X-ASF-Spam-Status: No, hits=1.0 required=5.0 tests=FORGED_YAHOO_RCVD,FREEMAIL_FROM,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of lists@nabble.com designates 216.139.236.26 as permitted sender) Received: from [216.139.236.26] (HELO sam.nabble.com) (216.139.236.26) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 26 Nov 2011 13:03:49 +0000 Received: from isper.nabble.com ([192.168.236.156]) by sam.nabble.com with esmtp (Exim 4.72) (envelope-from ) id 1RUHuj-0006Zf-Fo for core-dev@hadoop.apache.org; Sat, 26 Nov 2011 05:03:29 -0800 Message-ID: <32876785.post@talk.nabble.com> Date: Sat, 26 Nov 2011 05:03:29 -0800 (PST) From: madhu_sushmi To: core-dev@hadoop.apache.org Subject: Hadoop - Distributed sorting MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: madhu_sushmi@yahoo.com Hi, I need to implement distributed sorting using Hadoop. I am quite new to Hadoop and I am getting confused. If I want to implement Merge sort, what my Map and reduce should be doing. ? Should all the sorting happen at reduce side? Please help. This is an urgent requirement. Please guide me. Thanks, Madhu -- View this message in context: http://old.nabble.com/Hadoop---Distributed-sorting-tp32876785p32876785.html Sent from the Hadoop core-dev mailing list archive at Nabble.com.