From owner-freebsd-stable@FreeBSD.ORG Sun May 31 14:47:34 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6F71B1065689 for ; Sun, 31 May 2009 14:47:34 +0000 (UTC) (envelope-from dan.naumov@gmail.com) Received: from yw-out-2324.google.com (yw-out-2324.google.com [74.125.46.28]) by mx1.freebsd.org (Postfix) with ESMTP id 2390B8FC1C for ; Sun, 31 May 2009 14:47:33 +0000 (UTC) (envelope-from dan.naumov@gmail.com) Received: by yw-out-2324.google.com with SMTP id 9so3761516ywe.13 for ; Sun, 31 May 2009 07:47:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=iYlsEl4Y2atJnAvQIodWM7oVr/FgN0fUhFHhGNY7o9c=; b=KrNk4XAPilxd6xql/IUZGtEUmeB13W3ZmyViY7HJgV7mxV5TLZ/Ps+ZxNZ6nSKu0mJ 8+JLjm2cqgIHaPpcbV6n99elJ58O/H/FmuKuvPqayt1tzkQg1OjKYNrtrsHNSOMgneU2 dGZJFHuBugkJ02cyHO108WEGHEw7B8PExvaY4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=IjI3cs2Yw9A9TXc2GctMqWTZtDhbJky4Jxk1L47SetCkqDk+7UY5bVmBpb+6Itrv3v UElcttGf5f5v21AXSGbo0gse4PliaX717jbdUCYG9QVDD7stRbDYwCqIqhgqQRaW2uxQ ShLQKo4GNaEmzOl3dkO7++gA6AGguRm+J5+Eg= MIME-Version: 1.0 Received: by 10.100.126.19 with SMTP id y19mr5794894anc.100.1243781253322; Sun, 31 May 2009 07:47:33 -0700 (PDT) In-Reply-To: References: <4A1FAB45.4040904@h3q.com> <4A1FBD4A.5080204@pp.dyndns.biz> Date: Sun, 31 May 2009 17:47:33 +0300 Message-ID: From: Dan Naumov To: Ronald Klop Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: =?ISO-8859-1?Q?Morgan_Wesstr=F6m?= , freebsd-stable@freebsd.org Subject: Re: ZFS on top of GELI / Intel Atom 330 system X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 31 May 2009 14:47:35 -0000 I am pretty sure that adding more disks wouldn't solve anything in this case, only either using a faster CPU or a faster crypto system. When you are capable of 70 MB/s reads on a single unecrypted disk, but only 24 MB/s reads off the same disk while encrypted, your disk speed isn't the problem. - Dan Naumov On Sun, May 31, 2009 at 5:29 PM, Ronald Klop wrote: > On Fri, 29 May 2009 13:34:57 +0200, Dan Naumov wrote: > >> Now that I have evaluated the numbers and my needs a bit, I am really >> confused about what appropriate course of action for me would be. >> >> 1) Use ZFS without GELI and hope that zfs-crypto get implemented in >> Solaris and ported to FreeBSD "soon" and that when it does, it won't >> come with such a dramatic performance decrease as GELI/ZFS seems to >> result in. >> 2) Go ahead with the original plan of using GELI/ZFS and grind my >> teeth at the 24 MB/s read speed off a single disk. > > 3) Add extra disks. It will speed up reading. One disk extra will about > double the read speed.