Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 69896 invoked from network); 10 Mar 2008 23:08:17 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 10 Mar 2008 23:08:17 -0000 Received: (qmail 2802 invoked by uid 500); 10 Mar 2008 23:08:14 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 2356 invoked by uid 500); 10 Mar 2008 23:08:13 -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 2334 invoked by uid 99); 10 Mar 2008 23:08:13 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 10 Mar 2008 16:08:13 -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; Mon, 10 Mar 2008 23:07:33 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id BAD2E234C08F for ; Mon, 10 Mar 2008 16:06:47 -0700 (PDT) Message-ID: <393232400.1205190407764.JavaMail.jira@brutus> Date: Mon, 10 Mar 2008 16:06:47 -0700 (PDT) From: "Doug Cutting (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Commented: (HADOOP-2834) Iterator for MapFileOutputFormat In-Reply-To: <25739672.1203021067680.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HADOOP-2834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12577242#action_12577242 ] Doug Cutting commented on HADOOP-2834: -------------------------------------- Would this return a new Entry per key/value pair? Would these each contain new key/value instances? The existing API encourages object reuse, which can provide substantial performance improvements. Do we want to encourage developers to develop suboptimal code? > Iterator for MapFileOutputFormat > -------------------------------- > > Key: HADOOP-2834 > URL: https://issues.apache.org/jira/browse/HADOOP-2834 > Project: Hadoop Core > Issue Type: Improvement > Components: mapred > Affects Versions: 0.17.0 > Reporter: Andrzej Bialecki > Fix For: 0.17.0 > > Attachments: map-file-v2.patch, map-file-v3.patch > > > MapFileOutputFormat produces output data that is sorted locally in each part-NNNNN file - however, there is no easy way to iterate over keys from all parts in a globally ascending order. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.