[Gluster-devel] Multiple NFS Servers (Gluster NFS in 3.x, unfsd, knfsd, etc.)

[Gordan Bobic]

I'm not sure if this is the right place to ask, but Google has failed me 
and it is rather related to the upcoming Gluster NFS export feature. 
What I'm interested in knowing is whether it will be possible to run 
Gluster NFS export for glfs mounts while using knfsd as per standard for 
exporting non glfs paths?

e.g. if /home is a glfs mounted volume and /usr/src is on a raw block 
device, will it be possible to have /home handled by the glfs NFS export 
while having /usr/src handled by the native knfsd?

As far as I can tell main problem with this setup is that I can't see 
how will RPC mountd on the server would know which NFS server should be 
handling the connection, if there were more than one (could more than 
one even be registered with RPC/portmap?).

One possible work-around I can think of is to have one daemon listen for 
NFS connections on TCP and the other on UDP, but this is a bit lame. The 
only other way I can think of doing it is to put something like an 
OpenVZ VM (jail/zone/chroot) on the server, bind mount one lot of 
volumes that needs exporting onto that, and then export each lot from a 
separate machine (one virtual one physical), from different IPs. Having 
said that, is it possible to get portmap/mountd to bind a different NFS 
daemon to different IPs without the need for virtualization?

Gordan