Re: [Condor-users] Computers missing from Condor pool

[Jaime Frey <jfrey@xxxxxxxxxxx>]

On Mar 7, 2008, at 8:50 AM, Rob de Graaf wrote:

> James wrote:
> > Do a "condor_status -l | condor_updates_stats | grep "Stats:"  And
> > check for lost updates.
>
> The change to the UDP buffer has decreased the percentage of lost
> updates as shown by condor_updates_stats by quite a bit; mostly 0-2%
> lost updates with some spikes at 10%, compared to 10-30% all round
> before the buffer increase. While this is definitely an improvement,
> we're still not satisfied with the number of hosts in the pool; ping
> sweeps still show some 20% additional live hosts the collector doesn't
> know about.
>
> Is there anything else we could try?


You can try setting CLASSAD_LIFETIME on the config file on your  
central manager. The default is 900 seconds. By increasing the value,  
ads are less likely to disappear due to dropped UDP packets. It also  
means that ads for crashed machines will linger longer in the  
collector, potentially being matched to jobs which then can't execute  
for a short period of time.

+--------------------------------+-----------------------------------+
|           Jaime Frey           | I used to be a heavy gambler.     |
|       jfrey@xxxxxxxxxxx        | But now I just make mental bets.  |
| http://www.cs.wisc.edu/~jfrey/ | That's how I lost my mind.        |
+--------------------------------+-----------------------------------+