Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 28419 invoked from network); 21 Mar 2008 23:21:26 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 21 Mar 2008 23:21:26 -0000 Received: (qmail 19754 invoked by uid 500); 21 Mar 2008 23:21:21 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 19721 invoked by uid 500); 21 Mar 2008 23:21:21 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 19704 invoked by uid 99); 21 Mar 2008 23:21:21 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 21 Mar 2008 16:21:20 -0700 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 21 Mar 2008 23:20:39 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 4993A234C0AA for ; Fri, 21 Mar 2008 16:19:24 -0700 (PDT) Message-ID: <1888057798.1206141564296.JavaMail.jira@brutus> Date: Fri, 21 Mar 2008 16:19:24 -0700 (PDT) From: "Yiping Han (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Created: (HADOOP-3072) Multiple mappers join into reducer MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Multiple mappers join into reducer ---------------------------------- Key: HADOOP-3072 URL: https://issues.apache.org/jira/browse/HADOOP-3072 Project: Hadoop Core Issue Type: New Feature Components: mapred Reporter: Yiping Han We would like to have multiple different mappers that takes input from different locations and output records with the same format. So the output of the mappers could be joint in the reducer easily. We know this can be achieved in the current framework. But the way to achieve it is not natural, less flexibility (need code change). Thus this would be a convenient feature to have. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.