Return-Path: Delivered-To: apmail-hadoop-common-user-archive@www.apache.org Received: (qmail 2983 invoked from network); 30 Dec 2010 05:23:18 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 30 Dec 2010 05:23:18 -0000 Received: (qmail 15383 invoked by uid 500); 30 Dec 2010 05:23:15 -0000 Delivered-To: apmail-hadoop-common-user-archive@hadoop.apache.org Received: (qmail 14904 invoked by uid 500); 30 Dec 2010 05:23:11 -0000 Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-user@hadoop.apache.org Delivered-To: mailing list common-user@hadoop.apache.org Received: (qmail 14896 invoked by uid 99); 30 Dec 2010 05:23:10 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 30 Dec 2010 05:23:10 +0000 X-ASF-Spam-Status: No, hits=1.5 required=10.0 tests=FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,RFC_ABUSE_POST,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of zhengda1936@gmail.com designates 209.85.216.169 as permitted sender) Received: from [209.85.216.169] (HELO mail-qy0-f169.google.com) (209.85.216.169) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 30 Dec 2010 05:23:01 +0000 Received: by qyk7 with SMTP id 7so11800605qyk.14 for ; Wed, 29 Dec 2010 21:22:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from :user-agent:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=AysV8ZJFEY+RnX7VtQUHNWFjqVsHRd0byxK5eHzbo2w=; b=KJ6dLXgfv06z5i/00G8MVRAxPZr2lv99WoKzyb2ZnNG5WvhWqSazE3n7+ZqdvN824o VsvkpQX5QUgfN6tDWepnw45OJCVu56JseQCMg29O6Rtlaf03q6IQYNtHbQokw/hwiicJ mLocZ3cW+cPWy1NRrY+/eY/U+uVxeJo7P6BOg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; b=GE1tjkw6YuVcT0H5fvy9st82nK3OzxoL0xxKY41CoE7W69kv5NsraPJdPtmcrkTzkr a16qQVrDbVdej2og1rS6Bl9SGYAC3uj67KF9zDFhCwrE52V87+wCmHu49yAd5+G2cmQr NcZDmZeYhY4X1XIdDebOlN53E+E7dMRDyCs0M= Received: by 10.229.96.70 with SMTP id g6mr13683764qcn.254.1293686560747; Wed, 29 Dec 2010 21:22:40 -0800 (PST) Received: from da-zhengs-macbook.local (c-69-255-36-233.hsd1.md.comcast.net [69.255.36.233]) by mx.google.com with ESMTPS id m14sm8990329qcu.20.2010.12.29.21.22.38 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 29 Dec 2010 21:22:39 -0800 (PST) Message-ID: <4D1C171D.5080202@gmail.com> Date: Thu, 30 Dec 2010 00:22:37 -0500 From: Da Zheng User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: common-user@hadoop.apache.org Subject: Re: documentation of hadoop implementation References: <4D1B7C03.7010701@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Hi Todd, It's exactly what I was looking for. Thanks. Best, Da On 12/29/10 5:02 PM, Todd Lipcon wrote: > Hi Da, > > Chris Douglas had an excellent presentation at the Hadoop User Group last > year on just this topic. Maybe you can find his slides or a recording on > YDN/google? > > -Todd > > On Wed, Dec 29, 2010 at 10:20 AM, Da Zheng wrote: > >> Hello, >> >> Is the implementation of Hadoop documented somewhere? especially that part >> where >> the output of mappers is partitioned, sorted and spilled to the disk. I >> tried to >> understand it, but it's rather complex. Is there any document that can help >> me >> understand it? >> >> Thanks, >> Da >> > > >