Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756454AbZDCCpn (ORCPT ); Thu, 2 Apr 2009 22:45:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756824AbZDCCpb (ORCPT ); Thu, 2 Apr 2009 22:45:31 -0400 Received: from moutng.kundenserver.de ([212.227.126.177]:56392 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756751AbZDCCp1 (ORCPT ); Thu, 2 Apr 2009 22:45:27 -0400 Date: Thu, 2 Apr 2009 19:45:24 -0700 (PDT) From: Christian Kujau To: Theodore Tso cc: Artem Bityutskiy , Linux Kernel Mailing List Subject: Re: EXT4-ish "fixes" in UBIFS In-Reply-To: <20090403020525.GI9870@mit.edu> Message-ID: References: <49CCCB0A.6070701@nokia.com> <20090403020525.GI9870@mit.edu> User-Agent: Alpine 2.01 (DEB 1184 2008-12-16) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Provags-ID: V01U2FsdGVkX18UGK10hHDJmQQei/8iYJdBM2yiT5yaFSsy1ZQ St/XP+6IgTEaAD1W6OhlbGJ1ef2Q1jfkMDlsR6goLIrv4nB9IM nHa3QpgV7u2kH0DgEt4XQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1061 Lines: 28 On Thu, 2 Apr 2009, Theodore Tso wrote: > It will, but you might not like the performance.... the reason why > it's there is that some users might want the particular tradeoff, but > it probably wouldn't make a good default. Thanks for confirming this. Yes, I know about the performance impact, but perhaps it's feasible for some setups. Christian. PS: I was curious *how* bad the impact was and so I tried generating a 477 MB tarball, first on an async, then on an sync mounted partition: /dev/md0 /mnt/md0 ext4 rw,noatime,barrier=1,data=ordered $ time tar -cf /mnt/md0/test.tar /usr real 1m36.615s /dev/md0 /mnt/md0 ext4 rw,sync,noatime,barrier=1,data=ordered $ time tar -cf /mnt/md0/test.tar /usr real 5m23.793s -- Bruce Schneier does not get kidney stones. He gets Rosetta Stones. -- 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/