[pxc]

And if you want any concurrency at all, you need 1 runner registration per concurrent job. And each runner needs its own user. And each runner requires a full and separate copy of the runner software, which is large (hundreds of megs) and self-updates.

[paulddraper]

You don't need your own user.

The rest is correct. (Though you can hardlink the installation.) And you can disable self-update, though it does it by default.

[pxc]

Ah right, I've forgotten because I'm using a multi-user strategy and a patched version of the runner at this point anyway. The config directory for each runner is normally based on its install path (insane), something like that?

[paulddraper]

The config directory based on the install directory, yes.

To be fair, running multiple copies of a service isn't that common.

E.g. if you wanted to run multiple copies of PostgreSQL you can't just do a vanilla install.

[gheltllck]

Hard-linking and running concurrent self-updates, sounds like a recipe for disaster.