From owner-freebsd-fs@FreeBSD.ORG Thu Nov 15 01:58:00 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3BBEFC42 for ; Thu, 15 Nov 2012 01:58:00 +0000 (UTC) (envelope-from frimik@gmail.com) Received: from mail-pa0-f54.google.com (mail-pa0-f54.google.com [209.85.220.54]) by mx1.freebsd.org (Postfix) with ESMTP id 09A138FC12 for ; Thu, 15 Nov 2012 01:57:59 +0000 (UTC) Received: by mail-pa0-f54.google.com with SMTP id kp6so785214pab.13 for ; Wed, 14 Nov 2012 17:57:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=H5IEkIkv3phq7O+zi0ba0XwZjlc9s+1qWV/xwTu9kXc=; b=oBh96SwpUHyWltvyTFX5CrKWy/D1E9zvq5NIpEnrYZt09n7eZ67RPuIkFoCWrLjsJh kaToH17lOvuF3l6jKdbMxBMXkBA81Vz2EO2wiIh0CipRrk4Q9q7KAT10JnAuqk8Y/n/M zveaxMB4l9I3s2AYleOKtxRV/A2vT0ohmAxUkyaJ9YtqJGpH1QHJ+3WcWgSyT/f7THtq XqJHy01ci8jtPan7csnOqqLQYN83lYrLLCxL1CBOIMO5p2XH9wkSQQhdxh4PxQTR0EeS iGhdINSzqQ7Rn4pBX6DUQgp1aqQ70s3RDU01CePxbuZrrTv8QC/ngvjf45pAh01sJ/AY U4PA== MIME-Version: 1.0 Received: by 10.68.202.7 with SMTP id ke7mr3401872pbc.114.1352944679542; Wed, 14 Nov 2012 17:57:59 -0800 (PST) Received: by 10.66.121.233 with HTTP; Wed, 14 Nov 2012 17:57:59 -0800 (PST) In-Reply-To: <20121115001840.GA27399@FreeBSD.org> References: <50A130B7.4080604@cse.yorku.ca> <20121113043409.GA70601@neutralgood.org> <50A2B95D.4000400@cse.yorku.ca> <50A2F804.3010009@freebsd.org> <20121115001840.GA27399@FreeBSD.org> Date: Thu, 15 Nov 2012 02:57:59 +0100 Message-ID: Subject: Re: RHEL to FreeBSD file server From: Mikael Fridh To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Nov 2012 01:58:00 -0000 On Thu, Nov 15, 2012 at 1:18 AM, John wrote: > ----- Julian Elischer's Original Message ----- > > On 11/13/12 1:19 PM, Jason Keltz wrote: > > >On 11/13/2012 12:41 PM, Bob Friesenhahn wrote: > > >>On Mon, 12 Nov 2012, kpneal@pobox.com wrote: > > >>> > > >>>With your setup of 11 mirrors you have a good mixture of read > > >>>and write > > >>>performance, but you've compromised on the safety. The reason > > >>>that RAID 6 > > ... > > > >By the way - on another note - what do you or other list members > > >think of the new Intel SSD DC S3700 as ZIL? Sounds very promising > > >when it's finally available. I spent a lot of time researching > > >ZILs today, and one thing I can say is that I have a major > > >headache now because of it!! > > > > ZIL is best served by battery backed up ram or something.. it's tiny > > and not a really good fit an SSD (maybe just a partition) L2ARC on > > the other hand is a really good use for SSD. > > Well, since you brought the subject up :-) > > Do you have any recommendations for an NVRAM unit usable with Freebsd? > I've always had my eyes on something like this for ZIL but never had the need to explore it yet: http://www.ddrdrive.com/ Most recommendations I've seen have also been around mirrored 15krpm disks of some sort or even a cheaper battery-backed raid controller in front of decent disks. for zil it would just need a tiny bit of RAM anyway.