From owner-freebsd-current Mon Dec 9 01:24:12 1996 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id BAA22428 for current-outgoing; Mon, 9 Dec 1996 01:24:12 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.8.4/8.8.4) with SMTP id BAA22422 for ; Mon, 9 Dec 1996 01:24:06 -0800 (PST) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id KAA05147; Mon, 9 Dec 1996 10:23:54 +0100 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id KAA26857; Mon, 9 Dec 1996 10:23:54 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.8.2/8.6.9) id KAA22223; Mon, 9 Dec 1996 10:08:44 +0100 (MET) From: J Wunsch Message-Id: <199612090908.KAA22223@uriah.heep.sax.de> Subject: Re: rdump slow To: freebsd-current@FreeBSD.org (FreeBSD-current users) Date: Mon, 9 Dec 1996 10:08:44 +0100 (MET) Cc: croot@btp1da.phy.uni-bayreuth.de (Werner Griessl) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199612090824.JAA27943@btp1da.phy.uni-bayreuth.de> from Werner Griessl at "Dec 9, 96 09:24:18 am" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (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 As Werner Griessl wrote: > > > DUMP: finished in 430 seconds, throughput 49 KBytes/sec > > > ^^^^^^^^^^^^^ !!!!! > > > > I can't confirm this. What's your blocksize? What system is the > > remote TCP peer? Is the tape streaming? > > > > Blocksize is the default (10), remote system is a DEC-alpha 3000/600, > tape is a HP-DAT 35480 with local transfer-rate ~250 kb/sec . Do you get the same slow througput when using rsh/dd for the tape? What does GNUtar's ``-f remote:/dev/ice'' yield? Does increasing the blocksize e.g. to 32 improve anything? Which throughput would you get to /dev/null on the remote machine? Questions, questions, questions. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)