From owner-freebsd-questions Wed May 29 20:28:49 2002 Delivered-To: freebsd-questions@freebsd.org Received: from kanga.honeypot.net (kanga.honeypot.net [208.162.254.122]) by hub.freebsd.org (Postfix) with ESMTP id 7B3F037B406 for ; Wed, 29 May 2002 20:28:43 -0700 (PDT) Received: from pooh.int (mail@pooh.int [10.0.1.2]) by kanga.honeypot.net (8.12.3/8.12.3) with ESMTP id g4U3SgmS095199 for ; Wed, 29 May 2002 22:28:42 -0500 (CDT) (envelope-from kirk@strauser.com) Received: from kirk by pooh.int with local (Exim 3.35 #1 (Debian)) id 17DGcD-0002tf-00 for ; Wed, 29 May 2002 22:28:41 -0500 To: freebsd-questions@freebsd.org Subject: Re: mv vs. tar [overlapping] References: <20020530022609.GA956@altair.mukappabeta.net> <20020529223005.O79882-100000@earl-grey.cloud9.net> <20020530030413.GA1063@altair.mukappabeta.net> From: Kirk Strauser Date: 29 May 2002 22:28:41 -0500 In-Reply-To: <20020530030413.GA1063@altair.mukappabeta.net> Message-ID: <87bsayjouu.fsf@pooh.int> Lines: 16 X-Mailer: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 2002-05-30T03:04:13Z, Matthias Buelow writes: > Without (even empirical) proof, I somehow doubt that there is much > difference in I/O-performance between reading and writing blocks in one > process and doing the same in two different ones; I mean, the disk doesn't > seek faster all of a sudden because of that, and if you read n blocks in > process 1, and write them in process 2, or do the same in one process, it > should be quite the same. That's assuming that 1) the source and destination are on the same drive, and 2) the filesystem(s) in question aren't on RAID volumes. In either of those cases, parallelizing transfers will certainly increase performance. -- Kirk Strauser The Strauser Group - http://www.strausergroup.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message