Re: [HTCondor-users] Multiple CCB on a single server

[Weiming Shi <swmtrc@xxxxxxxxx>]

Hi Todd,

Thanks for your information. I have a further question on 2)

2) If I specify multiple addresses in CCB_ADDRESS, will all the specified
CCBs be connected?

    Yes. Other daemons will select a CCB to use from their advertised list at random.

Is there a way to make a daemon to select Âto useÂa local CCB that is colocated with the daemon on the same server if available?

Thanks

On Fri, Mar 30, 2018 at 2:27 PM, Todd L Miller <tlmiller@xxxxxxxxxxx> wrote:

1) How many nodes can each CCB support if MAX_FILE_DESCRIPTORS can be
configured large enough?

    I don't recall that we've ever found the limit. In practice, I imagine it depends on the security settings as much as anything else.

2) If I specify multiple addresses in CCB_ADDRESS, will all the specified
CCBs be connected?

    Yes. Other daemons will select a CCB to use from their advertised list at random.

3) If I run multiple CCBs on one server and assign different ports to them
following a guideline available at
https://htcondor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToConfigCollectors
and include those CCBs (bound to different ports) in CCB_ADDRESS of execute
nodes, will there be multiple connections established between each execute
node and the same node that runs multiple CCBs running?

    Yes.

4) If CCB daemons are restarted, will execute node that has CCB_ADDRESS
configured be able to reconnect to the restarted CCB daemons?
There is a configuration called CCB_HEARTBEAT_INTERVAL, which seems to
indicate that the reconnecting is supported.

    Yes.

- ToddM
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