26 Jan
2000
26 Jan
'00
7:50 p.m.
I've seen tcpdump ported to HP-UX. I've also seen problems like this historically traced back to a bad attribute cache on the HP. Try mounting the filer with the -noac option on HP and see if it addresses the issue. If it doesn't, proceed with getting a network trace from the client.
Attribute cache corruption would make directory listing changes not show up, but if an existing file is modified, closed, and still looks like the unmodified version, then it's not attribute caching. It's something else, and mounting noac likely won't help.
--
Sam Rafter Escalations Jerk
Network Appliance rafter@netapp.com
With considerable forethought, Fox, Adam said:
: A good tool for Tech Support people (HP or NetApp)
: is a network trace of the transactions. This is
: especially good if you have one client who is working
: and one who is not. Taking a packet chase of each
: and comparing them tells Support people (and possible
: engineers) a lot of useful information.
:
: If you can't take traces from the client side
: (Solaris and SGI have snoop, HP I don't think ships
: one), you can always try pktt on the NetApp. This
: produces a TCP dump-format which some utilities can
: covert to other formats (snoop, sniffer, etc.).
:
: If you do decide to open a ticket with NetApp on this,
: getting some kind of packet trace will be very useful.
: A properly-done trace can tell us if the client is doing
: something that the server doesn't respond to properly, or
: if the client isn't generating a request or something else.
: Another bonus of getting this is it helps Engineers of
: any vendor figure out what's going on and possibly with
: reproduction efforts.
:
: Just a suggestion.
:
: -- Adam Fox
: NetApp Professional Services, NC
: adamfox@netapp.com
:
: > -----Original Message-----
: > From: Graham Knight [mailto:grahamk@ast.lmco.com]
: > Sent: Wednesday, January 26, 2000 11:06 AM
: > To: toasters@mathworks.com
: > Subject: HPUX 10.20 problems
: >
: >
: >
: > We have a problem with HP-UX 10.20 clients. Occasionally
: > they stop getting NFS updates from our NAC servers. For
: > instance, you might create a file, but when you
: > attempt do an "ls" on the file it does not
: > appear. But if you log into another system and do an "ls"
: > it is there. The only solution we have found is
: > to reboot the HP.
: >
: > HP is no help. Their tech support continues it's
: > downward spiral.
:
: >
: > At one point a few years ago we had the exact same
: > problem with HP's and solved it by installing 4 or
: > 5 patches. It was just dumb blind luck that I happened
: > upon an HP tech who knew what he was doing. Now those
: > patches are out of date, and the problem has popped
: > up again.
: >
: > My hope is that someone on the list knows about this problem
: > and can give me a list of patches they installed to
: > fix it. Any input would be most appreciated.
: >
: > Thanks,
: > Graham
: >