Re: NFS over RDMA with no TCP/UDP

[Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>]

On 10/6/2014 2:11 PM, Adam Brenner wrote:
> Howdy,
>
> On our HPC cluster, we are exploring the option of mounting a NFS
> client over RDMA where no TCP/UDP connection will be available. Both
> the client and the server will have RDMA configured with OFED.
>
> Is this possible?

I'm not sure what you mean by "where no TCP/UDP connection will be 
available."?  What iWARP devices are you using?

>
> If so, what address would we specify on the NFS client side as the
> source host? iWARP address + port number? How I find out the iWARP
> address? Is that the same as the GID given by the command ibaddr? Or
> is this the Node GUID from ibstat? Do we have to safe escape or quote
> this address for both the mount option and /etc/exports?

Basically you configure the iWARP device's ethernet interface for normal 
NIC traffic, and use that IP address for the NFSRDMA mount. See 
Documentation/filesystems/nfs/nfs-rdma.txt for details.

Steve.


> thanks,
> /adam
>
> --
> Adam Brenner
> Computer Science, Undergraduate Student
> Donald Bren School of Information and Computer Sciences
>
> System Administrator, HPC Cluster
> Office of Information Technology
> http://hpc.oit.uci.edu/
>
> University of California, Irvine
> www.ics.uci.edu/~aebrenne/
> aebrenne-sXc7qaQca9o@public.gmane.org
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