Return-Path: X-Original-To: apmail-lucene-java-user-archive@www.apache.org Delivered-To: apmail-lucene-java-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 6122FC454 for ; Fri, 27 Apr 2012 19:58:30 +0000 (UTC) Received: (qmail 93204 invoked by uid 500); 27 Apr 2012 19:58:28 -0000 Delivered-To: apmail-lucene-java-user-archive@lucene.apache.org Received: (qmail 93143 invoked by uid 500); 27 Apr 2012 19:58:28 -0000 Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: java-user@lucene.apache.org Delivered-To: mailing list java-user@lucene.apache.org Received: (qmail 93134 invoked by uid 99); 27 Apr 2012 19:58:28 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 Apr 2012 19:58:28 +0000 X-ASF-Spam-Status: No, hits=3.4 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,HK_RANDOM_ENVFROM,HK_RANDOM_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of teddyyyy123@gmail.com designates 209.85.217.176 as permitted sender) Received: from [209.85.217.176] (HELO mail-lb0-f176.google.com) (209.85.217.176) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 Apr 2012 19:58:20 +0000 Received: by lbbgg13 with SMTP id gg13so1057601lbb.35 for ; Fri, 27 Apr 2012 12:58:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=T7bSnnB70kcV59mpcqSOP3XtUGLDwFAg2Q2tT4JnjII=; b=yA6irPgirKrYBqd7+jc2qmA6FRXJ45WwhqtmD9axHlB7DWpFerdrRyIt6KPXeXmfbX g3XLauu8/YeIyOwPYyXY7DN+7yY7imYMdQEyDCNjYdm4NGPH+nyAP5Tvbg7S9lZzVG5M MFvVOrqRDIfvlTEi4JhalG9d8XD0q8Y+UcVcJi9ZG8Ejqx8BjoMOmdRtDCAX7HmUtpuR wDHqHyLmQ7LLJJYejtCZ0vTkt8rnfZRQIVv4oi9R319pO3rrDiXY1m3ceET2o9Iyg0B1 Q7UlmoglzpCo6Kuq2KOVmXYMp1eAwwBuQ95ImGEzkR6GH/iQ3Id8sH3Qa1qzR1fXKm65 iT2w== Received: by 10.112.82.230 with SMTP id l6mr5670041lby.60.1335556679910; Fri, 27 Apr 2012 12:57:59 -0700 (PDT) MIME-Version: 1.0 Received: by 10.112.111.8 with HTTP; Fri, 27 Apr 2012 12:57:39 -0700 (PDT) In-Reply-To: References: From: Yang Date: Fri, 27 Apr 2012 12:57:39 -0700 Message-ID: Subject: Re: lucene algorithm ? To: java-user@lucene.apache.org Content-Type: multipart/alternative; boundary=f46d04016a877bc6fe04beae85f8 --f46d04016a877bc6fe04beae85f8 Content-Type: text/plain; charset=ISO-8859-1 yes, that's why many search engines will not allow user visit page > number greater than a threshold. for most application, users usually > only visit top results. That's why ranking algorithm is important. if > you found your users always turn to next page, I think you should > consider your application. you should provide more filter condition or > improving ranking algorithm. > > > > interesting, I just tried google "yellow dog" and ask it to retrieve from the 900's result, the access time is 0.6 seconds, while the first page comes out in 0.33 seconds (well of course the first page result may well be cached, but as I go from the first page to the 8'th page, the time does consistently increase) https://www.google.com/#q=yellow+dog&hl=en&prmd=imvns&ei=Q_maT433OombiQeB3dm1Dg&start=900&fp=a2cbb8d5ae567362 --f46d04016a877bc6fe04beae85f8--