From owner-freebsd-current@FreeBSD.ORG  Tue May 30 00:43:29 2006
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: current@freebsd.org
Delivered-To: freebsd-current@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 8B44F16A8B3;
	Tue, 30 May 2006 00:43:29 +0000 (UTC)
	(envelope-from jd@ugcs.caltech.edu)
Received: from groat.ugcs.caltech.edu (groat.ugcs.caltech.edu
	[131.215.176.110])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4810543D48;
	Tue, 30 May 2006 00:43:29 +0000 (GMT)
	(envelope-from jd@ugcs.caltech.edu)
Received: by groat.ugcs.caltech.edu (Postfix, from userid 3640)
	id 4CC855880B; Mon, 29 May 2006 17:43:28 -0700 (PDT)
Date: Mon, 29 May 2006 17:43:28 -0700
From: Paul Allen <nospam@ugcs.caltech.edu>
To: Scott Long <scottl@samsco.org>
Message-ID: <20060530004328.GF28128@groat.ugcs.caltech.edu>
References: <447AB34C.4030509@sippysoft.com>
	<11410450515.20060529225555@lacave.net>
	<447B77AF.9060309@samsco.org> <447B7A55.7040704@FreeBSD.org>
	<447B7CB7.5000000@FreeBSD.org> <447B8900.4050603@samsco.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <447B8900.4050603@samsco.org>
Sender: jd@ugcs.caltech.edu
Cc: gallatin@freebsd.org, "current@freebsd.org" <current@freebsd.org>
Subject: Re: Importing iSCSI target from NetBSD
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 30 May 2006 00:43:31 -0000

>From Scott Long <scottl@samsco.org>, Mon, May 29, 2006 at 05:51:28PM -0600:
> >P.S. Just to make it clear - just consider running iSCSI over 100MBps 
> >link or even a slower WAN links, which I think covers very large market 
> >for this technology now. Performance constrain imposed by running in 
> >userland is unlikely to be an issue at all.
> >
> >-Maxim
> 
> Every company and group that I've talked to about iSCSI is worried about
> performance.  In any case, please follow the lead of Mr. Senault and
> look at making this a port.
> 
> Scott

And in particular the anticipation of low(er) cost  10Gb Ethernet is a
driving factor behind iSCSI.

AFAIK, the low-latency performer in this field (for NICs) is from Myricom.
Andrew Gallatin (one of the FreeBSD alpha committers)  was responsible for 
porting the myrinet drivers, so perhaps he can comment as to whether FreeBSD 
will be getting a driver for their 10GbE cards.  Ethernet at these speeds is 
real stress-test for many OSs; it should be interesting to see how FreeBSD 
holds-up.

                           Paul