question CSD Role Command dependency in Archives of Support Questions (Read Only)

CSD Role Command dependency

svarnau — Thu, 02 Mar 2017 19:36:51 GMT

Hi,

In specifying a custom service, is there a way to specify a command dependency? For instance, start of MASTER role should be done before start of WORKER role?

Or start of each role kicks off in parallel and should synch up on their own?

Thanks

Re: CSD Role Command dependency

Darren — Thu, 02 Mar 2017 21:25:17 GMT

Hi,

It's best for systems (especially distributed systems) to not require careful ordering in startup. Instead, each process should wait for a bit for any dependency process (like the master) to come up.

If possible, I also suggest that this wait period should be configurable, and at least 2 minutes in duration by default.

There's no way for CSDs to control the ordering of start commands since we prefer robustness to ordering.

Thanks,
Darren