Re: [Condor-users] Amount of ports used by condor

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On Fri, Feb 24, 2006 at 01:10:44PM +0800, Greg.Hitchen@xxxxxxxx wrote:
> This doesn't seem to be what happens though, unless I'm misunderstanding
> something. Our current test pool has of the order of 50-60 machines
> in it (windows machines).  We have used the HIGHPORT and LOWPORT options
> to restrict the port range to 9000-10000. I used tcpdump on our linux
> central manager and it shows only 445 unused ports in that range,
> i.e. about 555 unique ones used (~ 55 machines X 10 ports each (1 vm)).
> 

Strange.  We currently have 1257 machines in our pool, and
our central manager is currently using less than 50 ports total.

How do you use tcpdump to report port usage?  

I use lsof.  For example, lets say you condor_collector was
running on pid 8871 and the IP address of the machine is 
128.444.444.444.  Then enter the following command:
 
    lsof -a -i @128.444.444.444 -p 8871

to view all ports in use by that process.  Do this for the
condor_collector and the condor_negotiator.

There are only a few settings in the condor_config that could
significantly impact the port usage on the central manager.
They are (off the top of my head):
   
        UPDATE_COLLECTOR_WITH_TCP  (ours is FALSE)
		COLLECTOR_SOCKET_CACHE_SIZE   (ours is 0)
		NEGOTIATOR_SOCKET_CACHE_SIZE (ours is 16)

Perhaps you are updating your collector w/ TCP and have a large
COLLECTOR_SOCKET_CACHE_SIZE?  

regards,
Todd