From user-return-12818-apmail-couchdb-user-archive=couchdb.apache.org@couchdb.apache.org Mon Sep 20 21:14:10 2010 Return-Path: Delivered-To: apmail-couchdb-user-archive@www.apache.org Received: (qmail 8156 invoked from network); 20 Sep 2010 21:14:10 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 20 Sep 2010 21:14:10 -0000 Received: (qmail 87602 invoked by uid 500); 20 Sep 2010 21:14:08 -0000 Delivered-To: apmail-couchdb-user-archive@couchdb.apache.org Received: (qmail 87544 invoked by uid 500); 20 Sep 2010 21:14:08 -0000 Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@couchdb.apache.org Delivered-To: mailing list user@couchdb.apache.org Received: (qmail 87531 invoked by uid 99); 20 Sep 2010 21:14:08 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 20 Sep 2010 21:14:08 +0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of paul.joseph.davis@gmail.com designates 209.85.214.180 as permitted sender) Received: from [209.85.214.180] (HELO mail-iw0-f180.google.com) (209.85.214.180) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 20 Sep 2010 21:14:01 +0000 Received: by iwn8 with SMTP id 8so6843016iwn.11 for ; Mon, 20 Sep 2010 14:13:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:content-type; bh=772CzSOoJzzpS9Gk/QHXrYLAdUr4696JZeau6lsSrFM=; b=eEUlXFUEM3ZPKwEKA2CgG9k5jMOWtdQSC9h1H2s4wMwdI2LhIx4f12b97ED5nQVNMr wyC90JxXvQ2sfkF9ha4jfYrLYwCso/NW1CflgRjPg0pvXtpOhsFAE/2Hpw9lGnF2s7sN r+tjXDHfZWPAxGfK3ILC6DlqMZcuEJ9ltK2Sk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=xZwHb6F+cKl2M+8Luescaz9wLhtfHpB444D0YkAtGEZJkKEE6Xl5dHFOPs22xrjyXD 25Sgj6PYLCsccVOeYXjLz+5SPpwf9H+4xdc1G6ojOA0Pj/RnL1gnyBMDQBVpYDpyfeEm hMz0Ka+nXsUd5qd2/MX6UqhyAHcmaPBTyHzPg= Received: by 10.231.145.1 with SMTP id b1mr10941168ibv.69.1285017221291; Mon, 20 Sep 2010 14:13:41 -0700 (PDT) MIME-Version: 1.0 Received: by 10.231.30.194 with HTTP; Mon, 20 Sep 2010 14:13:01 -0700 (PDT) In-Reply-To: References: From: Paul Davis Date: Mon, 20 Sep 2010 17:13:01 -0400 Message-ID: Subject: Re: distributed map-reduce views To: user@couchdb.apache.org Content-Type: text/plain; charset=ISO-8859-1 On Mon, Sep 20, 2010 at 5:01 PM, Robert Newson wrote: > A nice explanation. I've never quite known how to respond to people > that, when I discuss CouchDB with them, say "why not use Hadoop?". > Admittedly it's mostly because I'm trying to hold back a biting > comment, since there's really no commonality besides the use of > (distinct variants of) the Map/Reduce (family of) algorithm(s). > > B. M/R := Map/Reduce Generally, when I hear people comparing CouchDB M/R to Google M/R, I remind them that Google M/R isn't real M/R. That generally shocks people enough that they're able to reconsider the differences and how the two things really aren't the same. Although if someone disagrees with you because they read the Google white paper on M/R you should feel free to make extended use of biting comments. HTH, Paul Davis