NFS locking
Hi,
I'm having problems with a couple of applications and reading about the
problem indicates its probably caused by locking not working correctly
on NFS. The problem seems to lie with the server end of the set up - my
guess is that it's not accepting the locks from the client machine. Both
the client and the server machines are running the latest nfs kernel
server and have statd and lockd running (according to ps). The relevant
info from the server is:
sprocket:/data# rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 37306 status
100024 1 tcp 35125 status
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100005 1 udp 866 mountd
100005 1 tcp 869 mountd
100005 2 udp 866 mountd
100005 2 tcp 869 mountd
100005 3 udp 866 mountd
100005 3 tcp 869 mountd
sprocket:/data# ps axf | grep lockd
3816 ? S 0:26 [lockd]
8361 pts/0 S+ 0:00 \_ grep lockd
sprocket:/data# ps axf | grep statd
8394 pts/0 S+ 0:00 \_ grep statd
30319 ? Ss 0:00 /sbin/rpc.statd
I have another machine that also acts as an NFS server with, as far as I
can tell, exactly the same version of NFS running. When I run rpcinfo -p
on that machine I see the report above and a number of lines like this:
100021 1 udp 1039 nlockmgr
which I presume are the lock managers. One of the applications that I am
struggling with is Open Office but I have side stepped the locking
problem there but turning off locking as per the well known hack. The
other application I am struggling with is digikam which flatly refuses
to work without locking.
If I move the digkam database to the machine that reports nlockmgr
everything is fine. On sprocket digikam doesn't work so I assume that
the lack of nlockmgr is the problem.
Further reading seems to say that lockd starts nlockmgr when it is
needed but the server has never started nlockmgr to the best of my
knowledge.
I'm really stuck at this point as I have tried everything I can think of
and Googled till my fingers hurt. Some help would be really appreciated.
Graham
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