From owner-freebsd-questions@FreeBSD.ORG Sun Nov 9 20:56:26 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 51E721065677 for ; Sun, 9 Nov 2008 20:56:26 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from weak.chn.comcast.net (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 1F17C8FC17; Sun, 9 Nov 2008 20:56:26 +0000 (UTC) (envelope-from kris@FreeBSD.org) Message-ID: <49174EAC.2070403@FreeBSD.org> Date: Sun, 09 Nov 2008 12:57:16 -0800 From: Kris Kennaway User-Agent: Thunderbird 2.0.0.17 (Macintosh/20080914) MIME-Version: 1.0 To: matt donovan References: <20081109202149.GA7091@ourbrains.org> <991123400811091225t392bd3f3i531dbe348a13e5e4@mail.gmail.com> <20081109203241.GB8395@ourbrains.org> <28283d910811091235q70181b52nc4235aea61518cd@mail.gmail.com> In-Reply-To: <28283d910811091235q70181b52nc4235aea61518cd@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Sluggish scheduling during a long disk copy X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Nov 2008 20:56:26 -0000 matt donovan wrote: > On Sun, Nov 9, 2008 at 3:32 PM, Dan wrote: > >> Odhiambo Washington(odhiambo@gmail.com)@2008.11.09 23:25:19 +0300: >>> On Sun, Nov 9, 2008 at 11:21 PM, Dan < >> dan-freebsd-questions@ourbrains.org>wrote: >>>> Hello. I am copying one 150G disk to a 3ware mirror, and the machine >>>> becomes downright unusable. It takes seconds to switch between >> 'konsole' >>>> windows and it takes seconds between I type a command (ssh session to >>>> a remote box, which I know is fast and unloaded) and see it executed. >>>> >>>> This is 7.1-BETA2. Is this a bug or a generally-accepted performance >>>> behavior? >>> >>> Bug? :-) >>> >>> How are you copying? >> >> I am copying an 'ntfs-3g'-mounted disk to the 3ware mirror with cp -a. >> It's around 150G of data, and it's going at about 10MB/s to the mirror. >> The mirror uses geom journaling. The speed is fine, the disks are slow. >> But should the copy really freeze-up the system like that? >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to " >> freebsd-questions-unsubscribe@freebsd.org" >> > > could be an issue with ntfs-3g driver Sounds like it to me. ntfs-3g uses FUSE, which is a userland filesystem framework. By design it will have poor I/O performance since every I/O transfer will require multiple trips into and out of the kernel. Kris