From owner-freebsd-performance@FreeBSD.ORG Wed Aug 12 04:53:26 2009 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 741DD106566C for ; Wed, 12 Aug 2009 04:53:26 +0000 (UTC) (envelope-from grarpamp@gmail.com) Received: from mail-ew0-f206.google.com (mail-ew0-f206.google.com [209.85.219.206]) by mx1.freebsd.org (Postfix) with ESMTP id 0B6EB8FC48 for ; Wed, 12 Aug 2009 04:53:25 +0000 (UTC) Received: by ewy2 with SMTP id 2so4194464ewy.43 for ; Tue, 11 Aug 2009 21:53:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type:content-transfer-encoding; bh=w9PjcqxNaJeFBWxBp7ZVyqQrICEGPgsWG52md9PTT6E=; b=ryqtmAeZ0mZpbZH3bw08eJtGFGTui0HNLD+AtgoUvC50HXB5cFd34IGCIbHDxUTD54 Ohl809CRM7YAUmIJ1qbBPHHXFZhxQ5jejkLeQFq+dFftpEjx2hzWFDEMF6IxPQ3dZioW CxK3gGi3+2swdg3IDvZuh3a8HtRq9uwDMl+HA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=QaQyg4QFJAlE7UiXR6QtwaTsN/lXbnNEhvIhdyiMi5OE1gPdBi4lYQvY3ffFpQdAGS P7RUjPF1MCE8B/b8nK9LukqnxrY9YmL37XbheYnAFi/vSlJ6fAIZniV/1wn2mjV2sNvy UdAoseXw7nTZ6DQClomOpzFuHQHHHqywo5X5E= MIME-Version: 1.0 Received: by 10.210.70.8 with SMTP id s8mr1874584eba.69.1250052804672; Tue, 11 Aug 2009 21:53:24 -0700 (PDT) Date: Wed, 12 Aug 2009 00:53:23 -0400 Message-ID: From: grarpamp To: freebsd-performance@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Wed, 12 Aug 2009 11:13:31 +0000 Subject: RELENG_7 heavy disk = system crawls X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Aug 2009 04:53:26 -0000 > cards aren't going to help with zfs. No, but for geli hifn(4) crypto(4)/(9), geli(8) might work if aes-cbc is indeed the mode geli uses. See the source I guess. > Does anyone make a disk controller with crypto built in? Yes. There are trays and cable dongles and things that do aes/des. And some drives are coming out with it in firmware. Does anyone like the cost, closed-source, and trust model of such hardware? > atacontrol I'm partly up against this because some failing drives are negotiating lower speeds for themselves. Never thought of is as a test tool though. > Pata doesn't do error detection on the control info ZFS handles that and informs user about silent corruption. Precisely because of the chained checksums. It's quite addicting. http://www.opensolaris.org/os/community/zfs/ Your little to no overhead for ffs sounds right as always.