From owner-freebsd-hackers Mon Feb 5 01:55:19 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id BAA15496 for hackers-outgoing; Mon, 5 Feb 1996 01:55:19 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id BAA15460 for ; Mon, 5 Feb 1996 01:54:39 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id KAA23632 for ; Mon, 5 Feb 1996 10:53:00 +0100 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id KAA07833 for freebsd-hackers@freebsd.org; Mon, 5 Feb 1996 10:53:00 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.7.3/8.6.9) id KAA04667 for freebsd-hackers@freebsd.org; Mon, 5 Feb 1996 10:50:33 +0100 (MET) From: J Wunsch Message-Id: <199602050950.KAA04667@uriah.heep.sax.de> Subject: Re: FAT filesystem performance To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Mon, 5 Feb 1996 10:50:32 +0100 (MET) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199602050730.IAA20098@labinfo.iet.unipi.it> from "Luigi Rizzo" at Feb 5, 96 08:30:26 am X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-hackers@freebsd.org Precedence: bulk As Luigi Rizzo wrote: > > > That is also true for any regular file. > > I was talking about regular files. Sorry, it was too late in the night / too early in the morning... I meant that there's no big difference between read/write and mmap, except that you need one extra copy operation for read/write. The caching should be about the same. > A high performance FAT filesystem is certainly useful, but it might > require a lot of work. Yes, but we hardly need it. (Both, stability and performance improvement.) If the caching situation can cause errors, perhaps write an dosfsck(8) as well. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)