From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Dake Subject: Re: Is multicast only available with UD Transport mode? Date: Sun, 14 Nov 2010 15:06:12 -0700 Message-ID: <4CE05D54.4070909@redhat.com> References: <20101112101223.44mbsbnygwcw0008@peddycoart.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Bart Van Assche Cc: ib-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 11/13/2010 01:35 AM, Bart Van Assche wrote: > On Fri, Nov 12, 2010 at 6:12 PM, wrote: >> Is multicast only available with UD Transport mode? > > In the past several reliable multicast protocols have been developed > on top of unreliable multicast for IPv4. See e.g. > > S. Pingali, D. Towsley and J. Kurose, A comparison of sender-initiated > and receiver-initiated reliable multicast protocols, SIGMETRICS '94 > Proceedings, 1994. > > Note: I'm not sure how much work it would take to convert one of the > existing reliable multicast protocols to IB. > > Bart. > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html Bart, Corosync (http://www.corosync.org) implements The Totem Single Ring Protocol which provides virtual synchrony via a closed process group C programming API. We have full support for native ibverbs/rdmacm infrastructure for RDMA operation. As an aside, it is challenging to bolt in RDMA support into any multicast protocol - good luck to those out there wishing to take this tsak on :) If people would like to see some preliminary benchmarks, mail me off list. Regards -steve -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html