Return-Path: Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: (qmail 51706 invoked from network); 9 Nov 2009 21:51:57 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 9 Nov 2009 21:51:57 -0000 Received: (qmail 86808 invoked by uid 500); 9 Nov 2009 21:51:57 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 86742 invoked by uid 500); 9 Nov 2009 21:51:57 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 86730 invoked by uid 99); 9 Nov 2009 21:51:57 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 09 Nov 2009 21:51:57 +0000 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, 09 Nov 2009 21:51:54 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id D6AB1234C046 for ; Mon, 9 Nov 2009 13:51:33 -0800 (PST) Message-ID: <574506299.1257803493873.JavaMail.jira@brutus> Date: Mon, 9 Nov 2009 21:51:33 +0000 (UTC) From: "Scott Chen (JIRA)" To: mapreduce-issues@hadoop.apache.org Subject: [jira] Created: (MAPREDUCE-1198) Alternatively schedule different types of tasks in fair share scheduler MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org Alternatively schedule different types of tasks in fair share scheduler ----------------------------------------------------------------------- Key: MAPREDUCE-1198 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1198 Project: Hadoop Map/Reduce Issue Type: Improvement Components: contrib/fair-share Reporter: Scott Chen Assignee: Scott Chen Matei has mentioned in MAPREDUCE-961 that the current scheduler will first try to launch map tasks until canLaunthTask() returns false then look for reduce tasks. This might starve reduce task. He also mention that alternatively schedule different types of tasks can solve this problem. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.