How to enable NFS file locking?

ahz10 · 03-10-2006, 01:02 PM

How do I enable NFS file locking? How do I know if it is enabled?

System:
- NFS server: Trustix 2.2 (Linux 2.4.31)
- NFS client: Fedora Core 4 (Linux 2.6.15)

Specific problem:
OpenOffice.org file locking doesn't work. In OOo 2.0.1, it wouldn't access any files with OOo's locking enabled. In OOo 2.0.2, it opens all files on NFS as read-only with OOo's locking enabled. We have an office, so locking is important.

rpc info:

Code:

$ rpcinfo -p server
   program vers proto   port
    100000    2   tcp    111  portmapper
    100000    2   udp    111  portmapper
    100004    2   udp    990  ypserv
    100004    1   udp    990  ypserv
    100004    2   tcp    993  ypserv
    100004    1   tcp    993  ypserv
    100011    1   udp    632  rquotad
    100011    2   udp    632  rquotad
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100021    1   udp  33963  nlockmgr
    100021    3   udp  33963  nlockmgr
    100021    4   udp  33963  nlockmgr
    100021    1   tcp  57032  nlockmgr
    100021    3   tcp  57032  nlockmgr
    100021    4   tcp  57032  nlockmgr
    100005    1   udp    649  mountd
    100005    1   tcp    652  mountd
    100005    2   udp    649  mountd
    100005    2   tcp    652  mountd
    100005    3   udp    649  mountd
    100005    3   tcp    652  mountd

$ rpcinfo -p client
   program vers proto   port
    100000    2   tcp    111  portmapper
    100000    2   udp    111  portmapper
    100024    1   udp  32768  status
    100024    1   tcp  41306  status
    100021    1   udp  32769  nlockmgr
    100021    3   udp  32769  nlockmgr
    100021    4   udp  32769  nlockmgr
    100021    1   tcp  54344  nlockmgr
    100021    3   tcp  54344  nlockmgr
    100021    4   tcp  54344  nlockmgr
    100007    2   udp    790  ypbind
    100007    1   udp    790  ypbind
    100007    2   tcp    793  ypbind
    100007    1   tcp    793  ypbind
    100011    1   udp    738  rquotad
    100011    2   udp    738  rquotad
    100011    1   tcp    753  rquotad
    100011    2   tcp    753  rquotad
    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    761  mountd
    100005    1   tcp    773  mountd
    100005    2   udp    761  mountd
    100005    2   tcp    773  mountd
    100005    3   udp    761  mountd
    100005    3   tcp    773  mountd

MensaWater · 03-10-2006, 03:01 PM

Its been over a year so this information may no longer be valid:

At a prior job we were trying to use NAS devices on our RH Linux and found issues with file locking in NFS. On researching it I was told that RH 2x had flock for NFS but version 3x specifically left it out because it had been very unreliable in 2x.

At that job any process that required file locking we had to move to internal local drives rather than using NAS (which is essentially just NFS).

A few months ago a vendor trying to sell NAS here indicated complete ignorance of any such issue but we saw it with two different applications at that prior job.

ahz10 · 05-22-2006, 11:34 AM

Solution:

/sbin/service nfslock start
chkconfig --levels 35 nfslock on