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Re: [Condor-users] Amount of ports used by condor
- Date: Fri, 24 Feb 2006 08:14:23 -0600
- From: Todd Tannenbaum <tannenba@xxxxxxxxxxx>
- Subject: Re: [Condor-users] Amount of ports used by condor
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