From owner-freebsd-fs@FreeBSD.ORG Sun Jan 10 19:28:52 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7927B106566C; Sun, 10 Jan 2010 19:28:52 +0000 (UTC) (envelope-from dan.naumov@gmail.com) Received: from mail-gx0-f218.google.com (mail-gx0-f218.google.com [209.85.217.218]) by mx1.freebsd.org (Postfix) with ESMTP id 211BB8FC12; Sun, 10 Jan 2010 19:28:51 +0000 (UTC) Received: by gxk10 with SMTP id 10so19856593gxk.3 for ; Sun, 10 Jan 2010 11:28:49 -0800 (PST) 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:content-type :content-transfer-encoding; bh=0hSRGY6+kL3bjd+kOmylcIzZ3qtHB1QS2EFsxm5ff8I=; b=t/ny8x6u4Kw1m9WFu4eQDnKncq+KvaGLK6XYDYUeTb8O7prqiBGq5HFRu++4kXYY1X eAtw/3TfTNGvpM91nPjderD9/BRmmpHM/ZnJLDBVvDOd+x8O4aTBSdyW7oTQp9/m8agn CBkGbB8CsmVMfUKjOQS/Gbf6i/opQFg3q2200= 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 :content-type:content-transfer-encoding; b=Ur/TX1mNPK3bpTH2g313bCZeZAb13FcIrqWYHcgSiZgw7mEfMaoR0dBOGWKw+QTAti Hz+Mcm/n8G42fNs63vDx4AFOgpeE1aMsz7Em+dWmwDasLooCzgQJsH8Ri3oC0EACjlkO 09cdQIX5hJn7sZg5Hdti7UiHouGPre+99nZCE= MIME-Version: 1.0 Received: by 10.101.10.15 with SMTP id n15mr24949753ani.82.1263151728952; Sun, 10 Jan 2010 11:28:48 -0800 (PST) In-Reply-To: <20100110184612.GC86684@plebeian.afflictions.org> References: <20100110161206.GA86684@plebeian.afflictions.org> <20100110184612.GC86684@plebeian.afflictions.org> Date: Sun, 10 Jan 2010 21:28:48 +0200 Message-ID: From: Dan Naumov To: Damian Gerow , freebsd-fs@freebsd.org, FreeBSD-STABLE Mailing List Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Subject: Re: ZFS on top of GELI X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 10 Jan 2010 19:28:52 -0000 On Sun, Jan 10, 2010 at 8:46 PM, Damian Gerow wrot= e: > Dan Naumov wrote: > : Yes, this is what I was basically considering: > : > : new AHCI driver =3D> 40gb Intel SSD =3D> UFS2 with Softupdates for the > : system installation > : new AHCI driver =3D> 2 x 2tb disks, each fully encrypted with geli =3D>= 2 > : geli vdevs for a ZFS mirror for important data > > If performance is an issue, you may want to consider carving off a partit= ion > on that SSD, geli-fying it, and using it as a ZIL device. =A0You'll proba= bly > see a marked performance improvement with such a setup. That is true, but using a single device for a dedicated ZIL is a huge no-no, considering it's an intent log, it's used to reconstruct the pool in case of a power failure for example, should such an event occur at the same time as a ZIL provider dies, you lose the entire pool because there is no way to recover it, so if ZIL gets put "elsewhere", that elsewhere really should be a mirror and sadly I don't see myself affording to use 2 SSDs for my setup :) - Sincerely, Dan Naumov