Return-Path: X-Original-To: apmail-hadoop-yarn-dev-archive@minotaur.apache.org Delivered-To: apmail-hadoop-yarn-dev-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 6904F10C7D for ; Wed, 12 Jun 2013 00:36:20 +0000 (UTC) Received: (qmail 56635 invoked by uid 500); 12 Jun 2013 00:36:19 -0000 Delivered-To: apmail-hadoop-yarn-dev-archive@hadoop.apache.org Received: (qmail 56538 invoked by uid 500); 12 Jun 2013 00:36:19 -0000 Mailing-List: contact yarn-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: yarn-dev@hadoop.apache.org Delivered-To: mailing list yarn-dev@hadoop.apache.org Received: (qmail 56530 invoked by uid 99); 12 Jun 2013 00:36:19 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 Jun 2013 00:36:19 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of acm@hortonworks.com designates 209.85.220.50 as permitted sender) Received: from [209.85.220.50] (HELO mail-pa0-f50.google.com) (209.85.220.50) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 12 Jun 2013 00:36:14 +0000 Received: by mail-pa0-f50.google.com with SMTP id fb1so6016984pad.9 for ; Tue, 11 Jun 2013 17:35:54 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:mime-version:content-type:subject:date:in-reply-to:to :references:message-id:x-mailer:x-gm-message-state; bh=O4dk3F75sGqH7HotgmmIhV7lWzEt2ktOCy/Mhh/Yp20=; b=SWAoosIT08d7TRIgDpjd8ZuOTYdBqeuNjRSbhH6lvOxSeqKZ3VQF1Cp7kbOpCF0mGV w4FHnf0nxLPA8s99RnQIqePxrGNzCrKvq1e16URMUWPoTqm0D+Js2TQ8er1YH+SR/48B Vd+5wrgy3lSdjRJVzn8KnGtbkt0M3hy9MaATnMJU4U7UtC9n8BmispRl372MVsPf2V0M fTSNcsvfvM4loVYijbIpm/6OdPOmlfEB9EWY23+wby/e65UOIFnpOpjeQO4ojuujxzzT VzVc0vyfZMAp15iBlgw3DU/LZsMKxIupI1LQYxR3KcC3TBF7chkVMIok+mjF25G+OzZt ArNw== X-Received: by 10.68.37.100 with SMTP id x4mr17100829pbj.122.1370997354305; Tue, 11 Jun 2013 17:35:54 -0700 (PDT) Received: from [10.11.3.98] ([192.175.27.2]) by mx.google.com with ESMTPSA id pq5sm12714004pbc.7.2013.06.11.17.35.51 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 11 Jun 2013 17:35:51 -0700 (PDT) From: Arun C Murthy Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-102--299357186 Subject: Re: In memory shuffle phase Date: Tue, 11 Jun 2013 17:35:50 -0700 In-Reply-To: <1370911566.29644.YahooMailNeo@web122406.mail.ne1.yahoo.com> To: yarn-dev@hadoop.apache.org References: <1370911461.76918.YahooMailNeo@web122401.mail.ne1.yahoo.com> <1370911566.29644.YahooMailNeo@web122406.mail.ne1.yahoo.com> Message-Id: X-Mailer: Apple Mail (2.1084) X-Gm-Message-State: ALoCoQk7rfll14ik4a5HrlzWy8aNoIY0t/iKpsX98CiWiSj6PkU711Oh5jEL5/8dxStxU/6+T0c6 X-Virus-Checked: Checked by ClamAV on apache.org --Apple-Mail-102--299357186 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Take a look at Apache Tez = (http://incubator.apache.org/projects/tez.html). I'll warn you that it's a little rough, but works. Arun On Jun 10, 2013, at 5:46 PM, Grandl Robert wrote: > Hi, >=20 >=20 > It is possible to run shuffle phase in memory ? I mean, the mapper to = write the intermediate output in memory only and the reducer to read it = from there. So no disk involved for intermediate output.=20 >=20 >=20 > If so, what are the configuration parameters I need to tune ? >=20 > Thanks, > Robert -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/ --Apple-Mail-102--299357186--