From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [RFC 0/13] extents and 48bit ext3 Date: Sat, 10 Jun 2006 17:05:58 +0100 Message-ID: <20060610160558.GA20471@infradead.org> References: <20060610134645.GB11634@stusta.de> <20060610144228.GA6416@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrew Morton , Jeff Garzik , ext2-devel , linux-kernel@vger.kernel.org, Adrian Bunk , Linus Torvalds , Gerrit Huizenga , cmm@us.ibm.com, linux-fsdevel@vger.kernel.org, Alex Tomas , Andreas Dilger Return-path: To: Ingo Molnar Content-Disposition: inline In-Reply-To: <20060610144228.GA6416@elte.hu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ext2-devel-bounces@lists.sourceforge.net Errors-To: ext2-devel-bounces@lists.sourceforge.net List-Id: linux-fsdevel.vger.kernel.org On Sat, Jun 10, 2006 at 04:42:28PM +0200, Ingo Molnar wrote: > Even ignoring all those arguments, i find your "ext3/ext4 is too > complex, use XFS or JFS" argument a bit naive. Please take a quick look > at the linecount of the filesystems in question: That isn't interesting at all. There's a lot more interesting features in jfs and xfs. XFS is still quite bloated even compared to it's features, but it's doing much more than just and ext3+extents. At a smaller scale that's true for jfs aswell. As mentioned a few times below just getting over the 8TB barrier is far from enough forthe next gen linux filesystems. XFS already goes on to address the Petabyte barrier. It's not like it couldn't address Petabytes of storage from the very beginning but you have such problems as needing a parallel fsck, fault tolerance, lots of parallelism in the filesystem and things like delayed allocations to hit linerate on dozends of FC HBAs in the system. And not, I don't want to bitch about ext3, it's doing good work for my on most of my machines, but it's definitly not what I would want to scale to really large filesystems. It's UFS done right, but the time of UFS derivates is slowly passing.