From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1GeeBT-0005dW-0Z for garchives@archives.gentoo.org; Mon, 30 Oct 2006 20:56:39 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.8/8.13.6) with SMTP id k9UKqq18021088; Mon, 30 Oct 2006 20:52:52 GMT Received: from mail.liveops.com (mail-pai.liveops.com [209.157.154.34]) by robin.gentoo.org (8.13.8/8.13.6) with ESMTP id k9UKn8Gb002338 for ; Mon, 30 Oct 2006 20:49:09 GMT Received: from [192.168.32.55] ([192.168.32.55]) by mail.liveops.com with Microsoft SMTPSVC(6.0.3790.1830); Mon, 30 Oct 2006 12:49:05 -0800 Message-ID: <45466541.4000404@megahappy.net> Date: Mon, 30 Oct 2006 12:49:05 -0800 From: Bryan Whitehead User-Agent: Thunderbird 1.5.0.7 (Macintosh/20060909) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] BIG reiserfs problem References: <454338D3.2000504@exceedtech.net> <45436C00.5020405@gmail.com> <200610282339.44017.alan@linuxholdings.co.za> In-Reply-To: <200610282339.44017.alan@linuxholdings.co.za> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Oct 2006 20:49:05.0851 (UTC) FILETIME=[D6DF10B0:01C6FC64] X-Archives-Salt: 2fcad2db-008e-4ed4-944e-86463689bbc1 X-Archives-Hash: 2a493291d4bd5080a37f2a8de41ae2c6 If you are so concerned with the awesomeness of XFS's caching... why not turn on data-journaling? Then data (not just meta-data) is committed to the journal. You can also tune XFS to not wait so long to hold cached data. Alan McKinnon wrote: > On Saturday 28 October 2006 16:41, b.n. wrote: > >> Dale ha scritto: >> >>> If you use XFS, make sure you have good power. XFS does not like >>> power failures at all. I have had to reinstall on a second rig >>> because of this very problem. If you have a UPS, that may be OK. >>> >> Thanks a lot for the advice. Power outages do happen and I don't have >> an UPS. Why does it happen? Isn't XFS journaled? >> > > Yes it is journaled but it also allows data to be very aggressively > cached. Make that VERY aggressively cached. With the result that data > can be held in a huge cache somewhere and the kernel can be convinced > it has been written to disk. > > Consider XFS's pedigree - SGI wrote it for their graphics machines. > These were big monsters backed up with high grade UPSs and such - the > logic was that if you spend a brazillion bucks on hardware, a mega UPS > is part of the deal, along with the wages to pay the army of admins you > also need. > > And, when doing video rendering, it turns out that it's easier to simply > re-render a frame when the filesystems does something odd with the data > rather than go to the effort of writing an FS that is 100% reliable. So > SGI sacrificed something that doesn't actually matter for their use > case to gain a significant performace increase (which does matter a > great deal) > > alan > -- gentoo-user@gentoo.org mailing list