Return-Path: Delivered-To: apmail-jakarta-lucene-user-archive@www.apache.org Received: (qmail 4759 invoked from network); 10 Jun 2004 10:44:03 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199) by minotaur-2.apache.org with SMTP; 10 Jun 2004 10:44:03 -0000 Received: (qmail 41888 invoked by uid 500); 10 Jun 2004 10:41:06 -0000 Delivered-To: apmail-jakarta-lucene-user-archive@jakarta.apache.org Received: (qmail 41862 invoked by uid 500); 10 Jun 2004 10:41:05 -0000 Mailing-List: contact lucene-user-help@jakarta.apache.org; run by ezmlm Precedence: bulk List-Unsubscribe: List-Subscribe: List-Help: List-Post: List-Id: "Lucene Users List" Reply-To: "Lucene Users List" Delivered-To: mailing list lucene-user@jakarta.apache.org Received: (qmail 41848 invoked by uid 99); 10 Jun 2004 10:41:05 -0000 Received: from [216.136.173.239] (HELO web12702.mail.yahoo.com) (216.136.173.239) by apache.org (qpsmtpd/0.27.1) with SMTP; Thu, 10 Jun 2004 03:41:05 -0700 Message-ID: <20040610104101.81449.qmail@web12702.mail.yahoo.com> Received: from [195.29.54.82] by web12702.mail.yahoo.com via HTTP; Thu, 10 Jun 2004 03:41:01 PDT Date: Thu, 10 Jun 2004 03:41:01 -0700 (PDT) From: Otis Gospodnetic Subject: Re: Performance: compound vs. multi-file index, indexing and searching To: Lucene Users List In-Reply-To: <40C61882.6040504@apache.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Virus-Checked: Checked X-Spam-Rating: minotaur-2.apache.org 1.6.2 0/1000/N I haven't tested the two in a multi-threaded setup, but my single-threaded unit test now clearly shows that there _is_ a consistent indexing performance difference between the two index structures. The multi-file structure seems to beat the compound index structure by about 7% in my tests, which matches Hui's report, and what I thought unit tests would show. Hui used Lucene 1.3, and I used the latest RC, and the results are about the same. Otis --- Doug Cutting wrote: > Otis Gospodnetic wrote: > > Can anyone comment on performance differences? > > I'd expect multi-threaded performance to be a bit worse with the > compound format, but single-threaded performance should be nearly > identical. ===== http://www.simpy.com/ - social bookmarking and personal search engine --------------------------------------------------------------------- To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org For additional commands, e-mail: lucene-user-help@jakarta.apache.org