Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264906AbUD2RSe (ORCPT ); Thu, 29 Apr 2004 13:18:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264902AbUD2RSe (ORCPT ); Thu, 29 Apr 2004 13:18:34 -0400 Received: from c3p0.cc.swin.edu.au ([136.186.1.30]:5386 "EHLO swin.edu.au") by vger.kernel.org with ESMTP id S264905AbUD2RS2 (ORCPT ); Thu, 29 Apr 2004 13:18:28 -0400 To: =?iso-8859-1?Q?J=F6rn?= Engel Cc: Timothy Miller , "Theodore Ts'o" , Miquel van Smoorenburg , linux-kernel@vger.kernel.org From: Tim Connors Subject: Re: File system compression, not at the block layer In-reply-to: <20040429095237.GC390@elf.ucw.cz> References: <408951CE.3080908@techsource.com> <20040423174146.GB5977@thunk.org> <20040427203426.GB6116@openzaurus.ucw.cz> <409036C4.7030102@techsource.com> <20040429094644.GA6098@wohnheim.fh-wedel.de> <20040429095237.GC390@elf.ucw.cz> X-Face: "0\RuOFb6AcQ}B_F/^%;;AmS%>"qr*^0t%eriBMe_x]B7&@b8_\i Date: Fri, 30 Apr 2004 03:17:26 +1000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1502 Lines: 35 Pavel Machek said on Thu, 29 Apr 2004 11:52:37 +0200: > Hi! > > > > I've always felt that way, but every time I mention it, people tell me > > > it's not worth the CPU overhead. For many years, I have felt that there > > > should be an IP socket type which was inherently compressed. > > > > Ever heard of ssh? ;) > > Its too high level, and if you want compression but not encryption > that's tricky to do. Just today we were trying to transfer ~350GB from a shell of a machine (running knopix, with a very small amount of installed software, and absolutely no disk space left) holding 4 disks to our raid disks -- the only thing installed was ssh, with even rsh being a symlink to ssh (I was going to remove a whole bunch of packages to free up some space so I could install rsh, but they didn't let me - it took them long enough to get it to "work" in the first place). Problem was that rsync combined with ssh was reading/writing at about 2MB/sec, given the age of the CPU. That will take a day more than they have. To put it bluntly, ssh is a *shit* solution on a secured net where people care about performance. -- TimC -- http://astronomy.swin.edu.au/staff/tconnors/ White dwarf seeks red giant star for binary relationship - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/