Why to run ISC Agent in Demo Docker ?

Question

Question

Robert Cemper · Feb 3, 2023

#Docker #InterSystems IRIS

For quite some time I am bored by slowly starting Docke Demos from OEX.
I type

docker-compose up - d

and after a few seconds

docker-compose logs

And I just see ISC Agent was started and is hanging around
No IRIS instance is up yet.

To my understanding, ISC Agent is totally useless in this single server instance
So with some investigations, I found a start parameter to avoid this behavior.
And now my IRIS instances start immediately (or what you can expect in a container).
What is it: --ISCAgent false applied in docker-compose.yaml:

Is there any reason not to do it if no MIIROR is in the game ?
Or any other reason or requirement?

Product version: IRIS 2022.2

Discussion (2)1

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Dmitry Maslennikov · Feb 3, 2023

There are many why's, and this is one of them for sure.

Another few things I found quite interesting

It starts ECPWork too, even when CE does not have any networking available, including ECP
It starts up to 7 AUXWD processes, not sure if there is any help from such amount if you have a limit of 10GB of databases there

2 0

score 2 · Answer 1 · 2023-02-03T08:14:58-05:00

And another thing were boring me, is that during the build with Dockerfile, there is no way to run normal IRIS but very minimal, as fast as possible, but fully functional, and suggested that as an idea. During the build, there are no need in ECP, TaskManager and Ensemble, even many having many Write Daemons, and also PWS (where it's left). Do not waste time, starting useless processes.