Hi.
Today I tried to form a server failover group out of three solitary
servers. These had active sessions on them. It didn't turn out too
well, leaving hordes of disconnected DTU's looking for their lost
session, but never being able to connect to them.
In panic I reverted the secondary servers to solitary service by
running utreplica -u, utconfig -u (which was scary as hell!) and then
utconfig to configure the servers back again. By divine interaction,
luck or just because it was designed this way, the user's sessions
actually survived this operation, and eventually most of the users got
their sessions back.
We run the servers on the public network, wit a separate DHCP server,
so there were no interconnect or DHCP issues issues involved.
So, the question is, what is the proper procedure here? I want to form
a failover group out of some already running servers?
Do I have to throw all my users out before attempting this? They never
log out voluntarily,
Any enlightenment is appreciated.
Christer Bernérus
IT Services & Systems
Chalmers University of Technology
Gothenburg, Sweden
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