Hi again, I was hoping someone here could answer another question. I
apologize if these are easy questions...
So a couple of days ago I was troubleshooting yet another NFS problem
(not the non-one I described a few days ago). I sent a 1G file over
to a server, did a TCP capture, and analyzed the results.
I noticed a lot of NULL procedure packets. A *lot* of them. In some
cases, one every 10 microseconds, and there were about 400,000 of them
I captured.
This seems like a lot of network traffic for very little reason.
Is this normal behavior, or something I should investigate further?
It seems to me like pinging the NFS server once every 10 microseconds
is a major waste of bandwidth.
--Russell
On Wed, Dec 03, 2008 at 10:11:26AM -0800, Russell Miller wrote:
> Hi again, I was hoping someone here could answer another question. I
> apologize if these are easy questions...
>
> So a couple of days ago I was troubleshooting yet another NFS problem
> (not the non-one I described a few days ago). I sent a 1G file over
> to a server, did a TCP capture, and analyzed the results.
>
> I noticed a lot of NULL procedure packets. A *lot* of them. In some
> cases, one every 10 microseconds, and there were about 400,000 of them
> I captured.
>
> This seems like a lot of network traffic for very little reason.
>
> Is this normal behavior, or something I should investigate further?
> It seems to me like pinging the NFS server once every 10 microseconds
> is a major waste of bandwidth.
It's either a bug, or you're misreading the traces--how are you
identifying these as NULL procedures? Also, are they NULL NFS calls, or
some other rpc protocol? And are you using krb5?
--b.