[nycbug-talk] What client connected to nfsd?

[Pete Wright]

On Tue, Apr 11, 2006 at 12:19:46PM -0400, Francisco Reyes wrote:
> Pete Wright writes:
> 
> >>I may be missing the point of your question since it's not an nfs  
> >>utility per-se, but,
> >># netstat | grep nfs
> 
> Not enough info (will explain)
> 
> >you may want to check out showmount
> 
> Here is my situation.
> I had an nfsd proces which was using up all the I/O the machine could 
> handle. I could kill it, but another nfsd will again will just pickup the 
> process.
> 
> I am basically trying to tie up the process ID from ps/top to a particular 
> machine connecting to that particular nfsd daemon.
> 
> So.. figure I start out in top, then "m" to view I/O, then 
> o "total"  to sort.. 
> 
> I see an nfsd with let's say a process ID (PID) 419 doing hundreds 
> of transactions per second.. and vmstat "b" column shows the HDs are 
> falling behind with nearly 200 transactions pending.. I now want to find 
> what machine is connected to the nfsd with PID 419
> 

ahh...pretty fun problem there ;)

have you tried running:
% strace -p 419

this should show you a couple things, what the nfsd is doing and
hopefully what client it is doing it with.


egad's, been doing too much on linux lately, that's ktrace not strace ;)

-p


> My guess is that a program was having problems and was doing lots of 
> transactions... at the client.. problem is that I don't know which 
> client machine.
> 
> I tried tcpdump, but that pretty much showed me all the nfs clients. :-(
> 

hmm..yea that's alot of data, esp. if it's pegging your machine.  not
sure how much time you have to work on this, but maybe
/usr/ports/net/ng_netflow can be of some help?

-pete


-- 
~~oO00Oo~~
Peter Wright
pete at nomadlogic.org
www.nomadlogic.org/~pete
310.869.9459