From user-return-5384-apmail-mahout-user-archive=mahout.apache.org@mahout.apache.org Sun Nov 21 12:46:24 2010 Return-Path: Delivered-To: apmail-mahout-user-archive@www.apache.org Received: (qmail 10219 invoked from network); 21 Nov 2010 12:46:23 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 21 Nov 2010 12:46:23 -0000 Received: (qmail 63640 invoked by uid 500); 21 Nov 2010 12:46:55 -0000 Delivered-To: apmail-mahout-user-archive@mahout.apache.org Received: (qmail 63426 invoked by uid 500); 21 Nov 2010 12:46:54 -0000 Mailing-List: contact user-help@mahout.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@mahout.apache.org Delivered-To: mailing list user@mahout.apache.org Received: (qmail 63418 invoked by uid 99); 21 Nov 2010 12:46:53 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 21 Nov 2010 12:46:53 +0000 X-ASF-Spam-Status: No, hits=4.7 required=10.0 tests=FREEMAIL_FROM,FREEMAIL_REPLY,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of srowen@gmail.com designates 209.85.214.170 as permitted sender) Received: from [209.85.214.170] (HELO mail-iw0-f170.google.com) (209.85.214.170) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 21 Nov 2010 12:46:46 +0000 Received: by iwn4 with SMTP id 4so1677885iwn.1 for ; Sun, 21 Nov 2010 04:46:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=xEBMMWCMi2B+DUu0xbAIiwTcVEXRMNZDwcGjr1sLtUQ=; b=WjO7HgeXlNPYVxoPqdCVxDfUioa5oms6aPHyfndsvNy7G1FF6QcHJ51P2zPQw24NE+ ImkrqgpZJXy/2CpVjcrqL8GRYjhbm2G3nlbl3qPdzQDo7Qs7Izaad98myz7fZEtn/9l0 bN3w2XW3SXb47hRQyjfcKfF/SRlxnziRbvsJE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=iMRk4CEpanR1gmW1kbz/jAY6j4GmfN4Kzf+gR8EViTWNmPCJgyGrfYlT/YoHgJWXVs xY7+9T259/SOMj0smxAfEavM1XUhx9Mpo4W5QS5EcYybDMzPBemX4Z/te92rhJGRhZJS QHq/3Ht5kVlzTrddLMq25PFJTC6VIWi3Xj7QQ= MIME-Version: 1.0 Received: by 10.231.34.2 with SMTP id j2mr5373417ibd.86.1290343584849; Sun, 21 Nov 2010 04:46:24 -0800 (PST) Received: by 10.231.158.200 with HTTP; Sun, 21 Nov 2010 04:46:24 -0800 (PST) In-Reply-To: References: <559426ADAC019241952D394FA3321D2613249F00EA@f-exch-mb1.ad.navteq.com> <4CE6EFB4.50300@apache.org> Date: Sun, 21 Nov 2010 12:46:24 +0000 Message-ID: Subject: Re: Can Mahout make recommendations while the recommender is being refreshed? From: Sean Owen To: user@mahout.apache.org Content-Type: multipart/alternative; boundary=00032557a0d203601104958f8798 X-Virus-Checked: Checked by ClamAV on apache.org --00032557a0d203601104958f8798 Content-Type: text/plain; charset=UTF-8 Agree with Ted's solution in practice. Stuff should already be using floats, or have the option to use floats, for this reason. The precision is usually not helpful in this context. On Sun, Nov 21, 2010 at 4:44 AM, Lance Norskog wrote: > Another option is to change the Double arrays to Floats. > > I tried this on one of the Recommenders (can't remember which one) and > the speed and result value were exactly the same. > > On Fri, Nov 19, 2010 at 1:46 PM, Ted Dunning > wrote: > > If you are running that close to full, then running more than one > > recommender might be a preferable solution. You can take one off-line, > > update it, bring it back, update the other. This decreases redundancy > for a > > small period, but that is usually an acceptable risk. > > > > On Fri, Nov 19, 2010 at 1:44 PM, Sebastian Schelter > wrote: > > > >> Good thing to talk about that issue, it's really not an ideal situation > >> to have FileDataModel need double memory at refresh time as it > >> effectively cuts in a half the amount of preferences that can be loaded > >> into per memory per machine. > >> > > > > > > -- > Lance Norskog > goksron@gmail.com > --00032557a0d203601104958f8798--