Client sees delay in io when nfs server starts after failover

Hi ,
I am using sles9 sp1 rc5 (2.6.5-7.139 kernel)
NFS server is running on a machines.
Client access server and does moderate amount
of io on mounted filesystem.
When nfs server switches to other machine ,
nfs client has to wait for 2-3 minutes so as
to continue io on new nfs server.
Sometimes client sees delay of 20-30
seconds only.Why is this difference seen in
different runs/executions.

Is this the expected behaviour ?
thanks,
kiran

__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com

-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
_______________________________________________
NFS maillist - [email protected]
https://lists.sourceforge.net/lists/listinfo/nfs