How many executives can there be? Online addition/removal of executive?

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Dear experts,

I browsed parts of the documentation and wiki but missed to understand a
basic property thus far. I understand corosync constitutes a ring of
executive daemons with application clients connected to the executive
daemons.

 - How many executive daemons can there be?
 - Can executive daemon be added and removed online?

I assume the number of application clients is limited by practical
matters only, for example, time required to reach out to all connected
application clients shoud be considered. Clients can connect and
disconnect without bringing the cluster down.

But, what if one wants to add executives? Will this require
reconfiguration of all other executives in the cluster, will the cluster
go down or experience a view change only...

I would like to have 3..30 machines connected. Each machine runs one
application (client). My naive thinking is to put an executive daemon on
each machine. The performance requirements are low and the APIs offered
by corosync seems to be a good match :-).

Thanks,
Ulf
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