Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261302AbVDIHrb (ORCPT ); Sat, 9 Apr 2005 03:47:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261308AbVDIHrb (ORCPT ); Sat, 9 Apr 2005 03:47:31 -0400 Received: from note.orchestra.cse.unsw.EDU.AU ([129.94.242.24]:21196 "EHLO note.orchestra.cse.unsw.EDU.AU") by vger.kernel.org with ESMTP id S261302AbVDIHr3 (ORCPT ); Sat, 9 Apr 2005 03:47:29 -0400 From: Neil Brown To: Willy Tarreau Date: Sat, 9 Apr 2005 17:47:08 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16983.34940.197017.568255@cse.unsw.edu.au> Cc: Chris Wedgwood , Linus Torvalds , Jeff Garzik , Matthias-Christian Ott , Andrea Arcangeli , Kernel Mailing List Subject: Re: Kernel SCM saga.. In-Reply-To: message from Willy Tarreau on Saturday April 9 References: <20050408041341.GA8720@taniwha.stupidest.org> <20050408071428.GB3957@opteron.random> <4256AE0D.201@tiscali.de> <4256C0F8.6030008@pobox.com> <20050408185608.GA5638@taniwha.stupidest.org> <20050409073726.GC7858@alpha.home.local> X-Mailer: VM 7.19 under Emacs 21.4.1 X-face: [Gw_3E*Gng}4rRrKRYotwlE?.2|**#s9D > I've just checked, it takes 5.7s to compare 2.4.29{,-hf3} over NFS (13300 > files each) and 1.3s once the trees are cached locally. This is without > comparing file contents, just meta-data. And it takes 19.33s to compare > the file's md5 sums once the trees are cached. I don't know if there are > ways to avoid some NFS operations when everything is cached. > > Anyway, the system does not seem much efficient on hard links, it caches > the files twice :-( I suspect you'll be wanting to add a "no_subtree_check" export option on your NFS server... NeilBrown - 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/