From owner-freebsd-chat Fri May 21 16:12:46 1999 Delivered-To: freebsd-chat@freebsd.org Received: from mail.HiWAAY.net (fly.HiWAAY.net [208.147.154.56]) by hub.freebsd.org (Postfix) with ESMTP id 5709A14DF2; Fri, 21 May 1999 16:12:39 -0700 (PDT) (envelope-from dkelly@nospam.hiwaay.net) Received: from nospam.hiwaay.net (tnt8-216-180-14-125.dialup.HiWAAY.net [216.180.14.125]) by mail.HiWAAY.net (8.9.1a/8.9.0) with ESMTP id SAA08023; Fri, 21 May 1999 18:12:10 -0500 (CDT) Received: from nospam.hiwaay.net (nospam.hiwaay.net [127.0.0.1]) by nospam.hiwaay.net (8.9.2/8.9.2) with ESMTP id SAA72816; Fri, 21 May 1999 18:10:46 -0500 (CDT) (envelope-from dkelly@nospam.hiwaay.net) Message-Id: <199905212310.SAA72816@nospam.hiwaay.net> X-Mailer: exmh version 2.0.2 2/24/98 To: Terry Lambert Cc: ragnar@sysabend.org (Jamie Bowden), eivind@FreeBSD.ORG, scrappy@hub.org, freebsd-chat@FreeBSD.ORG From: David Kelly Subject: Re: SGI, XFS and OSS? In-reply-to: Message from Terry Lambert of "Fri, 21 May 1999 21:35:48 -0000." <199905212135.OAA03301@usr07.primenet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 21 May 1999 18:10:45 -0500 Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Terry Lambert writes: > > XFS on an indy R4600/133mhz with ultra-narrow drives on a scsi2-fast > > controller did better than my K6/233mhz with AHA-2940UW with UW drives for > > large directory reads and writes. > > This is not a useful comparison. Partly I agree. The Indy series are/were the bottom of the line at SGI when they were introduced. When monitored a huge "rm -rf" doesn't consume much CPU time on either Irix or FreeBSD so CPU speed and bus bandwidth don't appear to be limiting factor. If I still had my Irix systems I'd pit a 400 MHz P-II with any SCSI HD and speed against a 64MB Indy R5000 with narrow 10M Byte/Sec SCSI and similar HD. What I have noticed with either FreeBSD or Irix, the disk transactions around 100 to 150 per second. XFS appears to get more milage per transaction, or its caching somewhere. Most likely its caching in its log partition. Others have observed FreeBSD with softupdates sounds like the HD has a heartbeat. I agree. But its nothing like a busy XFS filesystem. -- David Kelly N4HHE, dkelly@nospam.hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message