Date: Wed, 08 May 1996 07:55:15 -0700 From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org> To: Nate Williams <nate@sri.MT.net> Cc: Michael Smith <msmith@atrad.adelaide.edu.au>, rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes), current@FreeBSD.ORG Subject: Re: *SLOW* remote dumps Message-ID: <199605081455.HAA04226@freefall.freebsd.org> In-Reply-To: Your message of "Wed, 08 May 1996 06:05:17 MDT." <199605081205.GAA24091@rocky.sri.MT.net>
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>> > > > 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 <host>:/dev/nrst0 2097000 <filesystem> > >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 ===========================================
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