From owner-freebsd-cluster@FreeBSD.ORG Thu May 12 23:10:53 2005 Return-Path: Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D196916A4CE for ; Thu, 12 May 2005 23:10:53 +0000 (GMT) Received: from mailhub2.uq.edu.au (mailhub2.uq.edu.au [130.102.149.128]) by mx1.FreeBSD.org (Postfix) with ESMTP id E5B4F43D7D for ; Thu, 12 May 2005 23:10:52 +0000 (GMT) (envelope-from m.swinbourne@uq.edu.au) Received: from smtp2.uq.edu.au (newsmtp2.uq.edu.au [130.102.149.129]) by mailhub2.uq.edu.au (8.13.3/8.13.3) with ESMTP id j4CNApYf009636 for ; Fri, 13 May 2005 09:10:51 +1000 (EST) Received: from jemima.soe.uq.edu.au (jemima.soe.uq.edu.au [130.102.4.196]) by smtp2.uq.edu.au (8.13.3/8.13.3) with ESMTP id j4CNAp8l009632 for ; Fri, 13 May 2005 09:10:51 +1000 (EST) Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Date: Fri, 13 May 2005 09:10:51 +1000 Message-ID: <5B5BBC864783B7439264DD5FF664F2A969F3F2@jemima.soe.uq.edu.au> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Introduction & RE: Clustering with Freebsd Thread-Index: AcVWxceOq7v1CI07SyyeUmY+aiz/ywAgddTA From: "Matthew SWINBOURNE" To: "FreeBSD Clustering List" X-Scanned-By: MIMEDefang 2.51 on UQ Mailhub on 130.102.149.128 Subject: RE: Introduction & RE: Clustering with Freebsd X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 May 2005 23:10:53 -0000 Cool, Sorry, I wasn't aware of that. With iSCSI these cards definitely help, but it there's no stack used for the AOE stuff then cool. Am I right in thinking then, that most of the increase in load is interupt load for I/O on the adapter? Matt -----Original Message----- From: Gabriel Ambuehl [mailto:gabriel_ambuehl@buz.ch]=20 Sent: Thursday, 12 May 2005 5:40 PM To: Matthew SWINBOURNE Cc: FreeBSD Clustering List Subject: Re: Introduction & RE: Clustering with Freebsd Matthew SWINBOURNE wrote: >Hi All, > >Something to think about along these lines are TCP Off-Loader (TOE)=20 >cards. If you are seriously looking at ATA over ethernet or something=20 >similar on any production scale, then these cards are a life saver. >Reduce the CPU overhead of running storage via TCP/IP to almost=20 >negligable. > > > > =20 > As I understand, this is the whole point of ATA over Ethernet (vs iSCSI): it doesn't actually use TCP/IP, it runs on raw ethernet (and thus isn't routeable but that's probably more of a feature than a bug).