max persistance time?

[Joseph T. Duncan]

>> real server kills off the active (but idle) desktop+applications in 1 day 
>> (there is a active but idle session autologout after x time setting on the 
>> real servers) these clients are the troublesome ones cause if they login a 
>> few times they will wind up with a active but idle desktop+application 
>> session on each real server
>
> are these idle processes being a resource hog? If not, can you just put up 
> with an app in a deranged but otherwise harmless state?

2 bad things can happen..

applications can be running full bore (think long batch type jobs.. and 
use a 100% of a cpu, user processes are limited to a single cpu on the 
real servers, with 4 cpus avalible per real server) this isnt bad, but 
come finals week a single user eating up a cpu per real server it could be 
fun ;p


last write wins.. if a client had something open in the orphaned session 
on a real server. Then gets a new desktop session on an diffrent real 
server, makes chages to a document, logs out correctly, then the orphaned 
session dies/closes.. they might loose work, or have their windows profile 
corrupted.

hopefully the keepalive settings will mitigate this ;)

>
> Can you differentiate the sessions you don't want from the ones that you want 
> to stay idle? eg look in netstat to see if you have multiple sessions from 
> one IP? (probably won't work, a whole bunch of people could be coming in 
> through a proxy).

not really.. on campus we have some wireless labs and wireless access that 
are behind a nat-proxy. (inside its 10.x.x.x i dont know what the 
exit/real ip is for the proxy stuff)

also I dont know how to test for an idle connection on the director... 
there is a windows management tool that reports idle time but I am not 
aware of mib/snmp way to export that information

I could make the active but idle timeout on the real servers much lower. 
but that would lead to unhappy proffessors that leave themselfs logged in 
overnight on weekdays.

_________________________________________________________________________
Info:                           Email:
Joseph T. Duncan                duncan at engr.orst.edu
109 Kidder Hall
Corvalis Or 97333