From owner-freebsd-current Tue May 7 23:04:48 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id XAA26635 for current-outgoing; Tue, 7 May 1996 23:04:48 -0700 (PDT) Received: from mail.barrnet.net (mail.barrnet.net [131.119.246.7]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id XAA26612 for ; Tue, 7 May 1996 23:04:43 -0700 (PDT) Received: from GndRsh.aac.dev.com ([198.145.92.241]) by mail.barrnet.net (8.7.5/MAIL-RELAY-LEN) with SMTP id XAA09486 for ; Tue, 7 May 1996 23:04:41 -0700 (PDT) Received: (from rgrimes@localhost) by GndRsh.aac.dev.com (8.6.12/8.6.12) id XAA02949; Tue, 7 May 1996 23:02:01 -0700 From: "Rodney W. Grimes" Message-Id: <199605080602.XAA02949@GndRsh.aac.dev.com> Subject: Re: *SLOW* remote dumps To: nate@sri.MT.net (Nate Williams) Date: Tue, 7 May 1996 23:02:01 -0700 (PDT) Cc: nate@sri.MT.net, current@FreeBSD.ORG In-Reply-To: <199605072330.RAA22700@rocky.sri.MT.net> from Nate Williams at "May 7, 96 05:30:41 pm" X-Mailer: ELM [version 2.4ME+ PL11 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 -current > > development last week, and backups speeds are running 30-40K/sec, > > whereas the exact same box running -stable (different drive, but > > iozone's are comperable) gives me 450-500K/sec. Any ideas? > > Note, I tried using rsh and it went *really* fast, although it wasn't a > usable dump. > > dump 0usf 138600 - /usr | rsh remotehost dd of=/dev/rmt/0ub Try that as: dump 0busf 10 138600 - /usr | rsh dd bs=10240 of=/dev/rmt/0ub > > With the above command I got my 450K/sec again, but unfortunately the > dump is unusable. Probably due to the fact that rsh broke up the blocks which dd then wrote to the tape using variable length records. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD