Return-Path: X-Original-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 2BCD4101A8 for ; Mon, 6 Jan 2014 07:11:54 +0000 (UTC) Received: (qmail 33599 invoked by uid 500); 6 Jan 2014 07:11:30 -0000 Delivered-To: apmail-hadoop-mapreduce-user-archive@hadoop.apache.org Received: (qmail 33498 invoked by uid 500); 6 Jan 2014 07:11:21 -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 33487 invoked by uid 99); 6 Jan 2014 07:11:19 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 06 Jan 2014 07:11:19 +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 209.85.213.173 as permitted sender) Received: from [209.85.213.173] (HELO mail-ig0-f173.google.com) (209.85.213.173) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 06 Jan 2014 07:11:14 +0000 Received: by mail-ig0-f173.google.com with SMTP id ut6so6515899igb.0 for ; Sun, 05 Jan 2014 23:10:54 -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=pIMAxADe8fQKrSHGFPx2xYcbaWUGS+IF3hP6DXsjiBI=; b=ZRWlotWydK9yk81VkdqwpITlyq6csrYiQZftWleyFadh1AQF8YNxoGQBMa/lW2OAOJ UoGN0/wlaA5n5aMCCowVq4Qf+o7d/ZwpyF6fzRebD5527msWtRASQylOo69Sg/F1jj38 OnETawiv8A09cHW5elMN6nnSY4J6+pFUC99Gt+eJwIUYtDDD63pbs7XM7c5INgNnSp+s 2fA7i8UWBLlPhCFVVKDEQbcIQOZF6d6YPkl9kfOWz6+a9xPNB+e9UlVT+0fHau5ox/VK e6ww8CWlv0ELd2hUz5BijCBh/olS8KixNj5wH+/z4RoyNTra3WXvPet94MdhCyf0/GWn 79fw== X-Gm-Message-State: ALoCoQkEzAkZjvvWoewWFQZvJoH0XtJoyLY3WDNKDmsTHwqWCyzMG2n+Kf1pQH/WxSSU0VMktTbB X-Received: by 10.42.35.5 with SMTP id o5mr77096452icd.8.1388992254080; Sun, 05 Jan 2014 23:10:54 -0800 (PST) MIME-Version: 1.0 Received: by 10.50.234.225 with HTTP; Sun, 5 Jan 2014 23:10:34 -0800 (PST) In-Reply-To: References: From: Harsh J Date: Mon, 6 Jan 2014 12:40:34 +0530 Message-ID: Subject: Re: Need idea for mapreduce To: "" Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org You seem to have it right - why not give it a try before asking? :) On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni wrote: > Given a csv file with numeric data. > Need to find maximum element of each column. > What will the map and reduce. > > a Guess: pass each column to map() > Find max in Reduce() > > -- > Thanks & Regards > > Unmesha Sreeveni U.B > Junior Developer > > http://www.unmeshasreeveni.blogspot.in/ > > -- Harsh J