Comments on: Materials from LinuxConf.eu RDMA tutorial (at last)

By: roland

roland — Wed, 15 Sep 2010 04:50:26 +0000

@Umayr, @Adit: No, on InfiniBand you must set up IPoIB to use the RDMA CM. The whole point of the RDMA CM is to allow IP addressing to be used with both InfiniBand and iWARP, and without an IPoIB interface configured, an IB port has no IP address.

By: Adit Ranadive

Adit Ranadive — Wed, 15 Sep 2010 04:45:05 +0000

Hi Roland,

Thanks for this code. Gives a good overview on how to use the RDMA CM API. Im in the same boat as the previous commenter. Is there a way to use RDMA CM without setting up IPoIB interface?

Thanks,
Adit

By: Umayr Hassan

Umayr Hassan — Thu, 18 Jun 2009 05:15:01 +0000

Hi Roland,

Thank you for sharing the code and tutorial – though I wish there was a some more information available on RDMA CM API and implementation than the man pages and the OFED README.

For Infiniband devices, is it possible in any way to use RDMA CM without having to set up the IPoIB interface?

Thanks!

By: Steve

Steve — Fri, 23 May 2008 15:43:55 +0000

I am trying to setup some rdma stuff on my work server, but am unfortunately finding very little documentation on the c++ api. Do you have a link or anything you could send me?

By: roland

roland — Sat, 27 Oct 2007 05:16:23 +0000

Yes, it is possible to implement the real iWARP protocol and verbs interface completely in software so it can run on a standard ethernet NIC, and in fact work has been done in that direction: http://www.osc.edu/research/network_file/projects/iwarp/iwarp_main.shtm. To be honest I don't know how usable the code currently available is, but you could give it a try and see.

By: no thanks

no thanks — Thu, 25 Oct 2007 14:07:06 +0000

Is it possible to experiment with RDMA programming using tcp over ethernet? That is, mock implementations of the verbs interface you describe that under the covers use tcp sockets, purely for educational purposes?