Re: [Condor-users] Do the following settings remove all UDP communication from a Condor pool?

[Dan Bradley <dan@xxxxxxxxxxxx>]

Ian,

I believe the settings you mentioned will achieve what you are trying to do.  In 7.6, it should also be sufficient to do this:

WANT_UDP_COMMAND_SOCKET = false
UPDATE_COLLECTOR_WITH_TCP = True

COLLECTOR_MAX_FILE_DESCRIPTORS = 3000

In 7.6, daemons that do not have a UDP port advertise this fact in their address information.  Therefore, it is not necessary to fiddle with protocol knobs such as SCHEDD_SEND_VACATE_VIA_TCP, because the client automatically switches to TCP when it sees that the server lacks a UDP port.

Since the address of the collector is hard-coded into the configuration file, there are two options: one is to use UPDATE_COLLECTOR_WITH_TCP, as in the above example.  The other is to add the "noUDP" flag to the collector address.  Example:

COLLECTOR_HOST = mycollector.host.name:9618?noUDP

--Dan

On 8/15/11 9:20 AM, Ian Chesal wrote:

It can sometimes be a bit tricky to get a handle on when and where Condor choses UDP over TCP. I have a situation where I'd like to ensure network communication is done completely over UDP.

Would the following cluster of settings be sufficient to ensure that UDP is never used in my pool for data comm?

SCHEDD_SEND_VACATE_VIA_TCP = True

SEC_INVALIDATE_SESSIONS_VIA_TCP = True

UPDATE_COLLECTOR_WITH_TCP = True

TCP_UPDATE_COLLECTORS = $(COLLECTOR_HOST)

COLLECTOR_MAX_FILE_DESCRIPTORS = 3000

Is it even possible to remove UDP completely from Condor's communications among machines?

Regards,

- Ian

---

Ian Chesal

Cycle Computing, LLC

Leader in Open Compute Solutions for Clouds, Servers, and Desktops

Enterprise Condor Support and Management Tools

http://www.cyclecomputing.com

http://www.cyclecloud.com

http://twitter.com/cyclecomputing

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