From owner-freebsd-questions@FreeBSD.ORG Thu Jun 21 16:53:58 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 172141065673 for ; Thu, 21 Jun 2012 16:53:58 +0000 (UTC) (envelope-from kayasaman@gmail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id 99A5B8FC1D for ; Thu, 21 Jun 2012 16:53:57 +0000 (UTC) Received: by eabm6 with SMTP id m6so454178eab.13 for ; Thu, 21 Jun 2012 09:53:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=v7PXaGv2Hu5RMaUTzCVBXJFHbYJE/mKAs9DwfObqZ3E=; b=yUoZbKGAweMs5gszppFVAIIpi5Puetx00LrLNjx/cmeu/Y126G63Shb68TViIteJqj oRQ78JG45He79w4wb0sUQwgwEy0jenUFFgUMJrzMRTbht+ImM1zM7lzpc1J1dIH2KvDi /558G23VlozpwJcDLq67Bs0kofawO2UDGE2tSxG3UYb/TYfbvuCwRDkwFVdMIfIfCuUy 613ybx6HAuqEebfXbLFHYG2VRYJK7Sp3gLmV16RgT5I6PyByT7lysygE4mHrIroZURv/ frBQySgGIbjY4iiZ7iIxiDMq1/FalBBowyB2F4mhw2VhlVKrWNfsVTibL56WfmiDpnb6 v33g== Received: by 10.14.28.77 with SMTP id f53mr5793435eea.98.1340297630688; Thu, 21 Jun 2012 09:53:50 -0700 (PDT) Received: from X220.optiplex-networks.com (81-178-2-118.dsl.pipex.com. [81.178.2.118]) by mx.google.com with ESMTPS id u14sm104632524eem.4.2012.06.21.09.53.47 (version=SSLv3 cipher=OTHER); Thu, 21 Jun 2012 09:53:49 -0700 (PDT) Message-ID: <4FE3519A.9070203@gmail.com> Date: Thu, 21 Jun 2012 17:53:46 +0100 From: Kaya Saman User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <4FE2CE38.9000100@gmail.com> <4FE30FBC.1070904@gmail.com> <88136b1c2b7ffcd86d9ff4180a39cabf@mail.magehandbook.com> In-Reply-To: <88136b1c2b7ffcd86d9ff4180a39cabf@mail.magehandbook.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Is ZFS production ready? 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: Thu, 21 Jun 2012 16:53:58 -0000 [...] > > My one note to the above would be to advise against using it for swap > - unless you have enough RAM to make sure you never swap. It doesn't > do well in that role, in my experience. (Though that was under a > slightly earlier version.) I remember on SXCE running on my test Sun E420r server that ZFS (can't remember if this was in the spec file or not??) would use **any** usable or unpartitioned file system as swap. I maybe totally off-base with this as I was too knew to investigate the issue and was still learning Solaris at the time but all of a sudden a remote mounted external drive would start getting zapped by I/O usage. Of course it couldn't be any user as the only user for those machines was me and I wasn't doing anything on either system. That was quite a weird thing, but happened many years ago so my memory is quite hazy on the specifics of the issue too.... I do recall running top to see swap usage at a few tens of gigs which was quite funny, of course unmounting the drive dropped the swap back to whatever got allocated by SXCE default. > > Daniel T. Staal Regards, Kaya