Hi,
On 23 Jan 2008, at 15:39, Nick Kutzko wrote:
Here's the output file. I'd appreciate anything you can tell me.
It raises a few questions...
Did the machine really take half an hour to log in, or was the trace
running after it finished?
What is the webserver at 206.166.93.137 doing (actually I don't think
this is important, it just seems to generate a lot of traffic at the
start if the trace).
What is the load on your AFP server during these logins? How much RAM
does it have?
Really all I can see from the trace is that there is a _lot_ of AFP
activity and that it takes a long time, This may indicate that your
AFP server simply can't handle that number of people logging in
simultaneously: it causes huge amounts of disk activity...
If you could do a similar trace of a quick login by the same account
for comparison, it might shed some more light on the situation...
HTH
-geoff
On 1/23/08 9:23 AM, "Geoff Lee" <email@hidden> wrote:
On 23 Jan 2008, at 15:18, Nick Kutzko wrote:
I did the dump, but I can't find the file. Where does it save to?
You should end up with a file called slowlogin.tcpdump in your
working
directory.
-geoff
On 1/23/08 6:11 AM, "Geoff Lee" <email@hidden> wrote:
Hi Nick,
On 22 Jan 2008, at 20:37, Nick Kutzko wrote:
Our users are taking anywhere from 2-5 minutes to login through
OD.
I have
tested users, groups, computers, the servers and I'm totally
lost.
Sometimes, they don't even get logged in for half of a class
period. My
account logs in quickly, less than 30 seconds, and when I tested
users
individually they were equally fast. However, come class time
when
they all
try to log in (25 kids, roughly) it lags or locks up. Any
suggestions? I
tried using a folder redirect through WGM, but it doesn't seem
to
help.
A packet trace can be invaluable in these situations. SSH into a
machine and run
tcpdump -vvv -i en0 -s0 -w slowlogin.tcpdump
Now log into the machine as a student and wait... Hit ctrl-C on
your
monitoring machine once the process has finished.
Then pop open the tcpdump file in wireshark (formerly ethereal,
available from darwinports) and have a look-see.
If this sounds daunting, feel free to mail me the output file
from
tcpdump and I'll have a look...
HTH
-geoff
______________________________________
Geoff Lee <email@hidden>
Computing Support
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 2341
______________________________________
______________________________________
Geoff Lee <email@hidden>
Computing Support
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 2341
______________________________________
<slowlogin.tcpdump.zip>
______________________________________
Geoff Lee <email@hidden>
Computing Support
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 2341
______________________________________
