From owner-freebsd-chat Wed Jul 14 15:52:30 1999 Delivered-To: freebsd-chat@freebsd.org Received: from sand5.global.net.uk (sand5.global.net.uk [194.126.80.249]) by hub.freebsd.org (Postfix) with ESMTP id 6EF4814DB8 for ; Wed, 14 Jul 1999 15:52:05 -0700 (PDT) (envelope-from marko@globalnet.co.uk) Received: from p9cs11a06.client.global.net.uk ([195.147.219.157] helo=marder-1.) by sand5.global.net.uk with esmtp (Exim 2.05 #1) id 114XsP-0000rq-00; Wed, 14 Jul 1999 23:51:45 +0100 Received: (from marko@localhost) by marder-1. (8.9.2/8.8.8) id XAA00837; Wed, 14 Jul 1999 23:46:23 +0100 (BST) (envelope-from marko) Date: Wed, 14 Jul 1999 23:46:23 +0100 From: Mark Ovens To: David Schwartz Cc: Phil Regnauld , chat@FreeBSD.ORG Subject: Re: Known MMAP() race conditions ... ? Message-ID: <19990714234623.C524@marder-1> References: <19990714223600.A524@marder-1> <000201bece48$2778d4f0$021d85d1@youwant.to> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.3i In-Reply-To: <000201bece48$2778d4f0$021d85d1@youwant.to>; from David Schwartz on Wed, Jul 14, 1999 at 03:28:10PM -0700 Organization: Total lack of Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, Jul 14, 1999 at 03:28:10PM -0700, David Schwartz wrote: > > > > "a little bit"? Have you any idea how many *hours* Diskeeper takes > > > > to defrag a 2.5GB NTFS partition after only a few weeks since the > > > > last defrag? > > > > > > Hmm. It's never been that bad for me. My 9Gb NTFS partitions > > > defragment in less than an hour. > > > > > > > I guess it depends how full the partition is. My 2.5GB has >2GB of > > data on it, not a lot of elbow room for Diskeeper to work with. > > My recollection is that Microsoft recommends that you keep your NTFS > partitions less than half full to 'solve' this problem. > Buy a 2GB disk to store 1GB of data. Sounds on a par with "first re-boot, and if that fails, re-install the OS" to fix a problem :-/. I did read somewhere that BG had instructed the NT5 (W2K) developers to "consider anything that requires a re-boot as a bug". > > > My AdvFS partitions on Digital UNIX machines took days to > > > defragment. And they were often more fragmented when they > > > finished than when they started. > > > > Just to illustrate how bad NTFS is, there are certain files DK > > won't touch (shelliconcache is one). Move them to another partition, > > delete the original, defrag, move the files back, run DK again, > > and guess what? the file(s) you just moved back are already > > fragmented. Hmm. > > I've never heard that before. I wonder how it manages to do that. > Maybe I don't have enough free space for DK to consolidate it all, so when you write a file NT starts filling the 'holes' from the start of the partition (just like FAT). > I think the amount of contiguous space reserved for a file when it's > created is tunable. But making that too large just makes things worse. > > By the way, I just recently enabled softupdates on the FreeBSD > machine that I use the most heavily. The performance difference > is astounding. > Hmm, I may give it a try, mind you I doubt I use my machine heavily enough to notice a significant difference. > DS > > -- FreeBSD - The Power To Serve http://www.freebsd.org My Webpage http://www.users.globalnet.co.uk/~markov _______________________________________________________________ Mark Ovens, CNC Apps Engineer, Radan Computational Ltd. Bath UK CAD/CAM solutions for Sheetmetal Working Industry mailto:markov@globalnet.co.uk http://www.radan.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message