From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Mc3hJ-0007kN-6E for garchives@archives.gentoo.org; Fri, 14 Aug 2009 20:48:25 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 932C0E0483; Fri, 14 Aug 2009 20:48:23 +0000 (UTC) Received: from relay02-haj2.antispameurope.com (relay02-haj2.antispameurope.com [83.246.65.52]) by pigeon.gentoo.org (Postfix) with ESMTP id 635CBE0483 for ; Fri, 14 Aug 2009 20:48:23 +0000 (UTC) Received: by relay02-haj2.antispameurope.com (ASE-Secure-MTA, from userid 1000) id 644CF6F05B5; Fri, 14 Aug 2009 22:48:21 +0200 (CEST) Received: from pluto.fokus.fraunhofer.de (pluto.fokus.fraunhofer.de [195.37.77.164]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by relay02-haj2.antispameurope.com (ASE-Secure-MTA) with ESMTP id 258636F05A6 for ; Fri, 14 Aug 2009 22:48:21 +0200 (CEST) Received: from EXCHSRV.fokus.fraunhofer.de (bohr.fokus.fraunhofer.de [10.147.9.231]) by pluto.fokus.fraunhofer.de (8.14.2/8.14.2) with SMTP id n7EKmLwf028229 for ; Fri, 14 Aug 2009 22:48:21 +0200 (MEST) Received: from rigel ([10.147.65.195]) by EXCHSRV.fokus.fraunhofer.de with Microsoft SMTPSVC(6.0.3790.3959); Fri, 14 Aug 2009 22:48:21 +0200 Date: Fri, 14 Aug 2009 22:47:46 +0200 From: Joerg.Schilling@fokus.fraunhofer.de (Joerg Schilling) To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: [OT] fast recursive local copy Message-ID: <4a85cd72.QfZcpHnNyIPM7wHm%Joerg.Schilling@fokus.fraunhofer.de> References: <20090814024724.GA6759@solfire> <4a852565.lHzcWaqePAPBfdw4%Joerg.Schilling@fokus.fraunhofer.de> <200908141900.25967.dirk.heinrichs@online.de> In-Reply-To: <200908141900.25967.dirk.heinrichs@online.de> User-Agent: nail 11.22 3/20/05 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-OriginalArrivalTime: 14 Aug 2009 20:48:21.0617 (UTC) FILETIME=[8F70BE10:01CA1D20] Content-Transfer-Encoding: quoted-printable X-Archives-Salt: cb727ef1-cd90-4bf1-906d-aae4700f7765 X-Archives-Hash: 4445d9e6b6391da054ac230de9cd4c10 Dirk Heinrichs wrote: > Am Freitag 14 August 2009 10:50:45 schrieb Joerg Schilling: > > > Note that on Linux you may need to add "-no-fsync" because file I/O i= s slow > > on Linux. On Solaris, not using -no-fsync slows things down by aprox.= 10% > > but allows star to grant that everything was really copied to stable > > storage. On Linux, ot using -no-fsync slows things down by aprox. 400= %, > > this is why I recommend to add "-no-fsync". > > This is also quite interesting. Do you have some (links to) recent benc= hmarks=20 > which would second that? Could this even be depending on the filesystem= used on=20 > Linux? I did this test aprox. 3-4 years ago. You may try to do an own test and r= eport. I did just rerun a test on a recent ubuntu in a VirtualBox environment an= d the=20 speedup factor with -no-fsync was 8x. J=F6rg --=20 EMail:joerg@schily.isdn.cs.tu-berlin.de (home) J=F6rg Schilling D-13353 = Berlin js@cs.tu-berlin.de (uni) =20 joerg.schilling@fokus.fraunhofer.de (work) Blog: http://schily.blo= gspot.com/ URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schil= y