From owner-freebsd-infiniband@FreeBSD.ORG Tue Feb 10 17:39:35 2015 Return-Path: Delivered-To: freebsd-infiniband@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 4BA7CA53 for ; Tue, 10 Feb 2015 17:39:35 +0000 (UTC) Received: from webmail2.jnielsen.net (webmail2.jnielsen.net [50.114.224.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "webmail2.jnielsen.net", Issuer "freebsdsolutions.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 295A1C93 for ; Tue, 10 Feb 2015 17:39:34 +0000 (UTC) Received: from [10.10.1.196] (office.betterlinux.com [199.58.199.60]) (authenticated bits=0) by webmail2.jnielsen.net (8.15.1/8.14.9) with ESMTPSA id t1AHdOIR063468 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 10 Feb 2015 10:39:26 -0700 (MST) (envelope-from lists@jnielsen.net) X-Authentication-Warning: webmail2.jnielsen.net: Host office.betterlinux.com [199.58.199.60] claimed to be [10.10.1.196] Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: IBSRP and switches From: John Nielsen In-Reply-To: <54DA2F75.3000307@lanl.gov> Date: Tue, 10 Feb 2015 10:39:25 -0700 Content-Transfer-Encoding: quoted-printable Message-Id: References: <54DA2F75.3000307@lanl.gov> To: Ron Croonenberg X-Mailer: Apple Mail (2.2070.6) Cc: freebsd-infiniband@freebsd.org X-BeenThere: freebsd-infiniband@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Infiniband on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Feb 2015 17:39:35 -0000 On Feb 10, 2015, at 9:19 AM, Ron Croonenberg wrote: > =46rom what I understand IBSRP is a point to point protocol and cannot = be switched over an IB switch, correct? (and the presented devices = cannot be see by initiators 'through' a switch. At $work we use SRP over InfiniBand with lots of switches in the mix. = Never had an issue. > Is there a 'scsi protocol' that I can run over IB that can be = switched? Unfortunately, there isn't currently SRP support on FreeBSD. There is = RDMA support, so it might be feasible to port the SRP code from Linux, = but I haven't really looked in to it. There's always iSCSI. FreeBSD 10.0 saw the addition of the kernel-based = target and initiator (with some improvements since), but I don't think = it takes advantage of RDMA or other acceleration techniques when used = with InfiniBand. I'd love to be wrong. :) JN