From owner-freebsd-current Wed May 8 07:55:19 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id HAA04237 for current-outgoing; Wed, 8 May 1996 07:55:19 -0700 (PDT) Received: from localhost.cdrom.com (localhost.cdrom.com [127.0.0.1]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id HAA04226 Wed, 8 May 1996 07:55:15 -0700 (PDT) Message-Id: <199605081455.HAA04226@freefall.freebsd.org> X-Authentication-Warning: freefall.freebsd.org: Host localhost.cdrom.com [127.0.0.1] didn't use HELO protocol To: Nate Williams cc: Michael Smith , rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes), current@FreeBSD.ORG Subject: Re: *SLOW* remote dumps In-reply-to: Your message of "Wed, 08 May 1996 06:05:17 MDT." <199605081205.GAA24091@rocky.sri.MT.net> Date: Wed, 08 May 1996 07:55:15 -0700 From: "Justin T. Gibbs" Sender: owner-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >> > > > I decided to backup my laptop since I got a new disk for doing -curren >t >> > > > development last week, and backups speeds are running >> > > > 30-40K/sec, >.. >> Why are you using rsh? >> >> We've been remote-dumping (and restoring, AFAIK) for quite some time, >> with excellent throughput using : >> >> dump 0fuB :/dev/nrst0 2097000 > >I never tried changing the block size, but using the stock rdump, my >dumps were running at 30-40K/sec (only under -current. -stable is >plenty fast). > >> on 2GB DDS tapes. Using host:device sends stuff to rmt which is highly >> preferable to rsh. > >Normally I use rdump, but it was so slow as to be unusable. > > >Nate You need to set a block size. I think there were some changes to the st driver that makes it more conservitive about what block size it uses by default. Do a diff between the two drivers and see what's different. -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================