From owner-freebsd-performance@FreeBSD.ORG Wed Oct 24 23:37:06 2007 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 254F316A41A for ; Wed, 24 Oct 2007 23:37:06 +0000 (UTC) (envelope-from andrew.george.hammond@gmail.com) Received: from nz-out-0506.google.com (nz-out-0506.google.com [64.233.162.225]) by mx1.freebsd.org (Postfix) with ESMTP id D0ED613C4B2 for ; Wed, 24 Oct 2007 23:37:05 +0000 (UTC) (envelope-from andrew.george.hammond@gmail.com) Received: by nz-out-0506.google.com with SMTP id l8so312038nzf for ; Wed, 24 Oct 2007 16:36:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; bh=52YNvdtTjzchycCdyl1iDQmcW4I7w1DyJTtvyFHtDsM=; b=oyXTYaP3znBZGD2cI04WCcv3fgGtqkYmIqC6rXOPeaWgQKLIs3I7xRQEzny+VOdcpKu2MGtF4QlyC6E7rwJ6lVuqGGpsEnPYJ+RsMYvK6QXQl4vyUDPxPuZFb/O1fyHYnsdCmMNn6eWwwVnl34EuzARToxBxudiw5t0aU1cz7qk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type; b=Z4gkjH1avWBT8h9hD5TpjQOQjnwZjd/C09A/warIl2S6CAicgXDfw/JdQ7kIirGdJaMdmwuca3WEAGFQUh6n4E8mJpwt8TUvq+6frpaAfscThgJIIleDYAcjSn+9cZ2aEaNtHauyPCVC39QNSZVMqLb+XLYLruI+PiLam0lRiG4= Received: by 10.65.194.13 with SMTP id w13mr2377457qbp.1193267353483; Wed, 24 Oct 2007 16:09:13 -0700 (PDT) Received: by 10.64.203.6 with HTTP; Wed, 24 Oct 2007 16:09:13 -0700 (PDT) Message-ID: <5a0a9d6f0710241609q6e9abf82tfc836081afcad7dc@mail.gmail.com> Date: Wed, 24 Oct 2007 16:09:13 -0700 From: "Andrew Hammond" To: freebsd-performance@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: overhead for geom striping? 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, 24 Oct 2007 23:37:06 -0000 Has anyone got numbers for overhead costs associated with using geom to strip across LUNs? I am particularly interested in latency increases, CPU costs, and any known throughput limitations. We're running FreeBSD 6.2. If there are any other issues associated with using it in production I'd really like to hear them too. Best Regards, Andrew Hammond