From owner-freebsd-stable Tue May 7 2:58: 5 2002 Delivered-To: freebsd-stable@freebsd.org Received: from atlantis.dp.ua (atlantis.dp.ua [193.108.46.1]) by hub.freebsd.org (Postfix) with ESMTP id 26BC137B408 for ; Tue, 7 May 2002 02:57:53 -0700 (PDT) Received: from localhost (dmitry@localhost) by atlantis.dp.ua (8.11.1/8.11.1) with ESMTP id g479vet24918 for ; Tue, 7 May 2002 12:57:41 +0300 (EEST) (envelope-from dmitry@atlantis.dp.ua) Date: Tue, 7 May 2002 12:57:39 +0300 (EEST) From: Dmitry Pryanishnikov To: freebsd-stable@freebsd.org Subject: Re: msdosfs serious performance problem with recent 4.5-STABLE In-Reply-To: <20020501001235.A792@grosbein.pp.ru.lucky.freebsd.stable> Message-ID: <20020507125250.P98604-100000@atlantis.dp.ua> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hello! On Tue, 30 Apr 2002, Eugene Grosbein wrote: > What's a reason of very slow writing to msdosfs (FAT32)? > I get no more than 350Kb/s with recent 4.5-STABLE. Using "systat -vm 1" you can see that msdosfs reads/writes are too short (their size are no more than cluster size AFAIK), and this increases number of I/O requests and limit performance. I don't know why msdosfs behaves so, it was always worked in this way ;( Sincerely, Dmitry Atlantis ISP, System Administrator e-mail: dmitry@atlantis.dp.ua nic-hdl: LYNX-RIPE To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message