thanks for reading me and helping me !
I got a NFS problem. It's not a permanent problem it comes and goes. Sometimes (very often), the clients using the mounted partitions are frozen when they're trying to open a new program like eclipse or kde. I think it's a lock problem due to maybe a network problem or optimization problem, but I don't know what to do, I tried a lot of thing but I failed....
The ubuntu version
cat /etc/issue Ubuntu 10.04.4 LTS \n \l
When Everything is OK :
Every 2.0s: rpcinfo -u 10.10.10.2 nlockmgr Wed Jan 9 13:50:41 2013 rpcinfo: RPC: Program/version mismatch; low version = 1, high version = 4program 100021 version 1 ready and waiting program 100021 version 2 is not available program 100021 version 3 ready and waiting program 100021 version 4 ready and waiting
When the problem happens
Every 2.0s: rpcinfo -u 10.10.10.X nlockmgr Wed Jan 9 13:58:39 2013 rpcinfo: RPC: Timed out program 100021 version 0 is not available
No problem with others like mountd or status
Server log :
Jan 9 14:02:25 dallas kernel: [95801.650031] statd: server rpc.statd not responding, timed out Jan 9 14:02:25 dallas kernel: [95801.650044] lockd: cannot monitor topalbum
client log :
kernel: lockd: server 10.10.10.X not responding, timed out
Jan 9 13:22:24 topalbum kernel: [6464607.366966] lockd: server fileserver OK Jan 9 13:23:24 topalbum kernel: [6464667.367109] lockd: server fileserver OK Jan 9 13:24:24 topalbum kernel: [6464727.520031] lockd: server fileserver not responding, still trying Jan 9 13:24:24 topalbum kernel: [6464727.520115] lockd: server fileserver not responding, still trying
avahi-daemon: Invalid query packet.
I tried to increase the RPCNFSDCOUNT in /etc/default/nfs-kernel-server using
echo "512" > /proc/fs/nfsd/threads
I tried to mount client partitions with no lock, tcp....
I tested the network performance with iperf, got 936 Go/s
I got statd enabled
server is up to date
I am exhausted...