On 01/07/2016 11:58 AM, Kaushal M wrote:
On Thu, Jan 7, 2016 at 11:00 AM, Sponge Tsui <jingjinglake@xxxxxxxxx> wrote:
hi, I'm sorry to ask for help if it is a common question. I noticed
that in glusterfs NLMv4 is only available over TCP,but not available
over UDP as the show of "rpcinfo -p" when using glusterfs to export
volumes through NFS protocol. The result is as follow:
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100005 3 tcp 38465 mountd
100005 1 tcp 38466 mountd
100003 3 tcp 2049 nfs
100021 4 tcp 38468 nlockmgr
100227 3 tcp 2049
100021 1 udp 868 nlockmgr
100021 1 tcp 869 nlockmgr
100024 1 udp 34507 status
100024 1 tcp 40511 status
I want to find out that why NLMv4 wasn't supported over UDP while
NLMv4 has been supported over TCP already. Whether or not NLMv4 over
UDP would be took into account.
Please excuse me if I've used bad terminology. Maybe it's because of
some other issues that i didn't realize. To be honest, I'm a newcomer
for glusterfs less than a mouth.
Thanks for your attention. I'm looking forward to your reply, and any
answers will be appreciated !
The GlusterFS NFS service only supports the NFSv3 protocol over TCP.
So the NLM service was also implemented only over TCP.
As for the reason why only TCP support was implemented for NFS, it was
probably because NFSv3 over TCP provided support for most clients,
with the least amount of implementation effort.
In addition, if you really need to use NLM4 over UDP, you could try
NFS-Ganesha [1] which has got support for both the transport protocols.
Thanks,
Soumya
[1]
http://gluster.readthedocs.org/en/latest/Administrator%20Guide/NFS-Ganesha%20GlusterFS%20Intergration/
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