From owner-freebsd-arch Tue Nov 27 7:38: 9 2001 Delivered-To: freebsd-arch@freebsd.org Received: from axl.seasidesoftware.co.za (axl.seasidesoftware.co.za [196.31.7.201]) by hub.freebsd.org (Postfix) with ESMTP id 765C637B41A for ; Tue, 27 Nov 2001 07:38:06 -0800 (PST) Received: from sheldonh (helo=axl.seasidesoftware.co.za) by axl.seasidesoftware.co.za with local-esmtp (Exim 3.33 #1) id 168kKC-000LTx-00; Tue, 27 Nov 2001 17:39:08 +0200 From: Sheldon Hearn To: Matthew Dillon Cc: David Greenman , Kirk McKusick , freebsd-arch@FreeBSD.ORG Subject: Re: Using a larger block size on large filesystems In-reply-to: Your message of "Mon, 26 Nov 2001 16:07:48 PST." <200111270007.fAR07mZ85526@apollo.backplane.com> Date: Tue, 27 Nov 2001 17:39:08 +0200 Message-ID: <82580.1006875548@axl.seasidesoftware.co.za> Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 26 Nov 2001 16:07:48 PST, Matthew Dillon wrote: | Not to mention the increased memory capacity in modern machines. | When you put it together, we ought to see only small differences | in regards to random seek+read performance. That's encouraging. | I've included the program below.. it would be cool if people | with RAID systems could run the same tests. I'm almost finished with my batch of postmark benchmarks and will try your program next. Postmark seems to reflect MTA-like access patterns very accurately. Postmark shows my Mylex eXtremeRAID + 15Krpm storage as about 3 times faster than my Compaq SmartArray + 10Krpm storage, and Exim shows a corresponding performance increase approaching a factor of 3. Can we rely on your program to be similarly reflective of a RDBMS-like access patterns? Ciao, Sheldon. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message