Return-Path: X-Original-To: apmail-hadoop-common-user-archive@www.apache.org Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 5E498105A8 for ; Thu, 16 Jan 2014 07:41:20 +0000 (UTC) Received: (qmail 60549 invoked by uid 500); 16 Jan 2014 07:41:12 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 59897 invoked by uid 500); 16 Jan 2014 07:41:11 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 59890 invoked by uid 99); 16 Jan 2014 07:41:10 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 16 Jan 2014 07:41:10 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of harsh@cloudera.com designates 209.85.213.174 as permitted sender) Received: from [209.85.213.174] (HELO mail-ig0-f174.google.com) (209.85.213.174) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 16 Jan 2014 07:41:04 +0000 Received: by mail-ig0-f174.google.com with SMTP id hl1so10023708igb.1 for ; Wed, 15 Jan 2014 23:40:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:content-type; bh=BTr7z+JYesucjRaOTJMHE5MlWBMb2rcOj72dc/D6r6o=; b=fJeYwbNbRRkMgQ4aLheDRvZ083ji+xOJZKZLt5HIyrXQwFsI7yUIE8mC++qGZpiRcD PtAqnKc4IcuIek2Tz8z1BW2+u3UTdf0zVbr3D2YUUbkoNXNMfvfK0mMn8X9OyK2hj2q6 /TE0aHIGglMdrOzW84wGtsab/damdxAXLu2W+CfgMmXM8yZbcPNQB7rDXFTFs0LygzG5 kiK2lFJO42BOYKy63teYNr78Apcsx4Ky6NExXzg3oTGrITbna6V0W2SmtXveoJmDwV5I i1mGn3RkPDhwPraNvlkpIg4O8tMajs0doVkKs/iqC4yz1manCKP39MX1rqWEz5ZIIEjv It4g== X-Gm-Message-State: ALoCoQkmV8v9K7065Q5KFJdoBPrDO0RU4pWmLf4HuAHnEBzrvNt/Q+lwo9iLmDV4jTxtATEB5O7J X-Received: by 10.50.143.74 with SMTP id sc10mr7686111igb.8.1389858043783; Wed, 15 Jan 2014 23:40:43 -0800 (PST) MIME-Version: 1.0 Received: by 10.50.234.225 with HTTP; Wed, 15 Jan 2014 23:40:23 -0800 (PST) In-Reply-To: References: From: Harsh J Date: Thu, 16 Jan 2014 13:10:23 +0530 Message-ID: Subject: Re: How to configure multiple reduce jobs in hadoop 2.2.0 To: "" Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org Yes, you need to manually set it. Please see the API at http://hadoop.apache.org/docs/stable2/api/org/apache/hadoop/mapred/JobConf.html#setNumReduceTasks(int) On Thu, Jan 16, 2014 at 12:45 PM, Ashish Jain wrote: > Dear All, > > I have a 3 node cluster and have a map reduce job running on it. I have 8 > data blocks spread across all the 3 nodes. While running map reduce job I > could see 8 map tasks running however reduce job is only 1. Is there a way > to configure multiple reduce jobs? > > --Ashish -- Harsh J