Return-Path: X-Original-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id BD11E10243 for ; Mon, 1 Dec 2014 08:47:13 +0000 (UTC) Received: (qmail 77603 invoked by uid 500); 1 Dec 2014 08:47:13 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 77537 invoked by uid 500); 1 Dec 2014 08:47:13 -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 77521 invoked by uid 99); 1 Dec 2014 08:47:13 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Dec 2014 08:47:13 +0000 Date: Mon, 1 Dec 2014 08:47:13 +0000 (UTC) From: "Yang Hao (JIRA)" To: mapreduce-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (MAPREDUCE-6176) To limit the map task number or reduce task number of an application MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/MAPREDUCE-6176?page=3Dcom.atla= ssian.jira.plugin.system.issuetabpanels:all-tabpanel ] Yang Hao updated MAPREDUCE-6176: -------------------------------- Fix Version/s: (was: 2.4.1) 2.5.0 > To limit the map task number or reduce task number of an application > -------------------------------------------------------------------- > > Key: MAPREDUCE-6176 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6176 > Project: Hadoop Map/Reduce > Issue Type: New Feature > Components: mr-am, mrv2 > Affects Versions: 2.5.0, 2.4.1, 2.5.1, 2.5.2 > Reporter: Yang Hao > Assignee: Yang Hao > Labels: patch > Fix For: 2.5.0 > > Attachments: MAPREDUCE-6176.patch > > > As MapReduce is a batch framework of calculation, so people may want to r= un application A as well as application B =E3=80=81C, and a limit resource = be put on A. A good way to do so is that we can limit the number of applica= tion's map task or reduce task. If we set mapreduce.map.num.max as M, then = the map task number will not exceed M. At the same time, if we set mapreduc= e.map.num.max as R, then the reduce task number will not exceed R -- This message was sent by Atlassian JIRA (v6.3.4#6332)