NFS to HEAVY TRAFFIC

Linux and Unix-Like Red Hat
1

dear all,
i need case with my nfs ....

Nov 11 15:49:13 BANK02 kernel: nfs: server 10.16.108.5 not responding, still trying
Nov 11 15:49:16 BANK02 last message repeated 2 times
Nov 11 15:49:20 BANK02 kernel: nfs: server 10.16.108.5 OK
Nov 11 15:49:20 BANK02 last message repeated 2 times
Nov 11 15:49:34 BANK02 kernel: nfs: server 10.16.108.5 not responding, still trying
Nov 11 15:49:47 BANK02 last message repeated 4 times
Nov 11 15:49:47 BANK02 kernel: nfs: server 10.16.108.5 OK
Nov 11 15:49:47 BANK02 last message repeated 4 times
Nov 11 15:49:55 BANK02 kernel: nfs: server 10.16.108.5 not responding, still trying
Nov 11 15:49:58 BANK02 kernel: nfs: server 10.16.108.5 OK

why my nfs like that any have same with my case i think my nfs is to heavy traffic tcp and how make to solve it:(

2

i assume , your nfsserver is OK ,at the now try some issues on the nfs client

  • check traffic between nfsserver and your client
# tracepath nfsserver

or try nfswatch

# yum install nfswatch && nfswatch -dst nfsserver -src nfsclient
  • try to boot with newer kernel and check your messages
# rpm -ivh kernel-newer.rpm && tail -f /var/log/messages
  • check the nfsmount parameters(tmeout and rsize/wsize) and if you still problem then change your settings according to Optimizing NFS Performance 
# nfsstat -m

regards
ygemici

3

which version of NFS is running? How many daemons is it running (if v3?) how much memory does this machine have, and what are your mount parameters? Have you considered cachefilesd on the client? Are you sure you are not using UDP?