From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 894681381F4 for ; Wed, 15 Aug 2012 08:16:01 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 71C2321C006; Wed, 15 Aug 2012 08:15:34 +0000 (UTC) Received: from icp-osb-irony-out8.external.iinet.net.au (icp-osb-irony-out8.external.iinet.net.au [203.59.1.225]) by pigeon.gentoo.org (Postfix) with ESMTP id D28F321C052 for ; Wed, 15 Aug 2012 08:13:50 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av4EAJBZK1B8qTsP/2dsb2JhbABFhgG0GoEHgiABAQUjZgsNCwICJgICV4glDKV6kzeBIYllAoM5ggqBEgOITJJbIooSgmw X-IronPort-AV: E=Sophos;i="4.77,772,1336320000"; d="scan'208";a="23655177" Received: from unknown (HELO moriah.localdomain) ([124.169.59.15]) by icp-osb-irony-out8.iinet.net.au with ESMTP; 15 Aug 2012 16:13:49 +0800 Received: from localhost (localhost [127.0.0.1]) by moriah.localdomain (Postfix) with ESMTP id E0DD823164D for ; Wed, 15 Aug 2012 16:13:48 +0800 (WST) X-Virus-Scanned: amavisd-new at lan.localdomain Received: from moriah.localdomain ([127.0.0.1]) by localhost (moriah.lan.localdomain [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DTCP2muUrj7i for ; Wed, 15 Aug 2012 16:13:43 +0800 (WST) Received: from [192.168.48.1] (troll [192.168.48.1]) by moriah.localdomain (Postfix) with ESMTP id CB1A423164A for ; Wed, 15 Aug 2012 16:13:43 +0800 (WST) Message-ID: <1345018423.9724.10.camel@troll> Subject: Re: [gentoo-user] Fast file system for cache directory with lot's of files From: Bill Kenworthy To: gentoo-user@lists.gentoo.org Date: Wed, 15 Aug 2012 16:13:43 +0800 In-Reply-To: <1345015910.9724.3.camel@troll> References: <1344962187.18169.0@numa-i> <1345015910.9724.3.camel@troll> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit 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 X-Archives-Salt: e3862174-1f45-4cf5-9502-4376ea073acb X-Archives-Hash: 3d6c050d8dad3182e400ecc9eb8d0fb1 On Wed, 2012-08-15 at 15:31 +0800, Bill Kenworthy wrote: > On Tue, 2012-08-14 at 18:36 +0200, Helmut Jarausch wrote: > > On 08/14/2012 04:07:39 AM, Adam Carter wrote: > > > > I think btrfs probably is meant to provide a lot of the modern > > > > features like reiser4 or xfs > > > > > > Unfortunately btrfs is still generally slower than ext4 for example. > > > Checkout http://openbenchmarking.org/, eg > > > http://openbenchmarking.org/s/ext4%20btrfs > > > > > > The OS will use any spare RAM for disk caching, so if there's not much > > > else running on that box, most of your content will be served from > > > RAM. It may be that whatever fs you choose wont make that much of a > > > difference anyways. > > > > > > > If one can run a recent kernel (3.5.x) btrfs seems quite stable (It's > > used by some distribution and Oracle for real work) > > Most benchmark don't use compression since other FS can't use it. But > > that's unfair. With compression, one needs to read > > much less data (my /usr partition has less than 50% of an ext4 > > partition, savings with the root partition are even higher). > > > > I'm using the mount options > > compress=lzo,noacl,noatime,autodefrag,space_cache which require a > > recent kernel. > > > > I'd give it a try. > > > > Helmut. > > > > > > Whats the latest on fsck tools for BTRFS? - useful ones are still not > available right? Reason I am asking is that is not an easy question to > google, and my last attempt to use BTRFS for serious work ended in tears > when I couldn't rescue a corrupted file system. > > BillK Sorry, replying to myself to clarify ... I sent this as I was reading the backlog before the statement that the tools are incomplete. my question is more along the lines of do they work? (which was answered as "I do not know" in posted links which are probably old) Another point I just saw is its inability to support swapfiles. Also in the past OO would not compile on a btrfs (/tmp/portage) filesystem as it did something that basicly killed everything. Other packages were fine. Then there was a certain man page I couldnt backup to a btrfs file system, ~/.gvfs files that hung the system when I tried to put on btrfs. Hopefully they have been fixed. BillK