From owner-freebsd-questions@FreeBSD.ORG Mon Jun 9 22:03:13 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A27FA106564A for ; Mon, 9 Jun 2008 22:03:13 +0000 (UTC) (envelope-from dick@nagual.nl) Received: from nagual.nl (cc20684-a.assen1.dr.home.nl [82.74.10.158]) by mx1.freebsd.org (Postfix) with ESMTP id 3852B8FC19 for ; Mon, 9 Jun 2008 22:03:12 +0000 (UTC) (envelope-from dick@nagual.nl) Received: from westmark (westmark.nagual.nl [192.168.11.22]) by nagual.nl (8.13.8+Sun/8.13.8/yanta) with ESMTP id m59M3dns024326 for ; Tue, 10 Jun 2008 00:03:39 +0200 (CEST) Date: Tue, 10 Jun 2008 00:02:50 +0200 From: Dick Hoogendijk To: freebsd-questions@freebsd.org Message-ID: <20080610000250.00005874@westmark> In-Reply-To: <20080609232736.X39884@wojtek.tensor.gdynia.pl> References: <1a5a68400806080604ped08ce8p120fc21107e7de81@mail.gmail.com> <20080608215648.Q9779@wojtek.tensor.gdynia.pl> <20080608230131.00003da7@westmark> <20080609001010.G59013@wojtek.tensor.gdynia.pl> <20080608233315.GA33530@dan.emsphone.com> <20080609094333.H27092@wojtek.tensor.gdynia.pl> <1a5a68400806091158n17397a14k66d85e30ac3e1a46@mail.gmail.com> <20080609232736.X39884@wojtek.tensor.gdynia.pl> Organization: de nagual X-Mailer: Claws Mail 3.4.0 (GTK+ 2.12.1; i386-pc-solaris2.11) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.63 on 192.168.11.35 Subject: Re: FreeBSD + ZFS on a production server? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Jun 2008 22:03:13 -0000 On Mon, 9 Jun 2008 23:31:35 +0200 (CEST) Wojciech Puchar wrote: > UFS use what's unused. works on 16MB and 16GB. It's difficult to tell about consumed memory in ZFS vs UFS since UFS can be quite agressive at caching as well. -(although this caching is often hidden by system tools and reported as "unused" memory)- > > project anyway. The live-cd hangs on "device detect". > > One of the pros for OpenSolaris I've noticed is the support for a > > virtual host > > man jail Jails are just slightly comparable to solaris zones. It's much more then resource control! They're really like independent machines with almost no memory footprint. It's quite common to run different zones for a mailserver, webserver and i.e. users. Sparse zones use little space, because lots of code is shared. It's all very tunable. Running 40 sparse zones is hardly noticable. Try that with 40 jails;-) > > I have now found a filesystem for linux that do checksum on the fly, > > btrfs. > > but why you need it?! all PATA/SATA drives do checksumming on every > read. in hardware, no CPU load. Because the ZFS checksumming makes the FS selfhealing. Chance for errors are almost nill. No fsck. Yes, it consumes memory, but memory is cheap, very cheap! CPU load is hardly noticable. -- Dick Hoogendijk -- PGP/GnuPG key: 01D2433D ++ http://nagual.nl/ + SunOS sxde 01/08 ++