Gluster users - Oct 2010 - Some client problems with TCP-only NFS in Gluster 3.1

I see that the built-in NFS support registers mountd in portmap only with 
tcp and not udp.  While this makes sense for a TCP-only NFS 
implementation, it does cause problems for some clients:

Ubuntu 10.04 and 7.04 mount just fine.

Ubuntu 8.04 gives "requested NFS version or transport protocol is not 
supported", unless you specify "-o mountproto=tcp" as a mount
option, in
which case it works just fine.

Solaris 2.6 & 7 both give "RPC: Program not registered".  Solaris 
apparently doesn't support the mountproto=tcp option, so there doesn't 
seem to be any way for Solaris clients to mount.

There may be other clients that assume mountd will be contactable via 
udp, even though they (otherwise) happily support TCP NFS...

Thanks,

Brent

{Resending due to incomplete response] 

Brent, 
Thanks for your feedback . To mount with a Solaris client use - 
` mount -o proto=tcp,vers=3 nfs://<SERVER-ADDR>:38467/<EXPORT>
<MNT-POINT>`

As to UDP access we want to force users to use TCP. Everything about Gluster is
designed to be fast , as NFS over UDP approaches line speed it becomes
increasingly inefficient, [1] we want to avoid that.

I have updated our documentation to reflect the required tcp option and Solaris
instructions.

[1] http://nfs.sourceforge.net/#faq_b10 


Thanks again, 

Craig 

--> 
Craig Carl 
Senior Systems Engineer 
Gluster 


From: "Brent A Nelson" <brent at phys.ufl.edu> 
To: gluster-users at gluster.org 
Sent: Thursday, October 21, 2010 8:18:02 AM 
Subject: [Gluster-users] Some client problems with TCP-only NFS in Gluster 3.1 

I see that the built-in NFS support registers mountd in portmap only with 
tcp and not udp. While this makes sense for a TCP-only NFS 
implementation, it does cause problems for some clients: 

Ubuntu 10.04 and 7.04 mount just fine. 

Ubuntu 8.04 gives "requested NFS version or transport protocol is not 
supported", unless you specify "-o mountproto=tcp" as a mount
option, in
which case it works just fine. 

Solaris 2.6 & 7 both give "RPC: Program not registered". Solaris 
apparently doesn't support the mountproto=tcp option, so there doesn't 
seem to be any way for Solaris clients to mount. 

There may be other clients that assume mountd will be contactable via 
udp, even though they (otherwise) happily support TCP NFS... 

Thanks, 

Brent 
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