Hi Peter,
A quick brainstorm:-
(a) can you not do something where you deregister them one at a time, or
in batches, on FS1
while registering them on FS2?
(b) use method 1, but set a short period for re-registration initially,
and then increase it once FS1's
taken down?
(c) use method 1, but take FS1 off the network before taking it down
(e.g. ifdown eth0, route delete default..?)
so that its unregistration attempts don't reach the gateways?
Cheers --
Dave
I have the following scenario for a 2-server FS system with failover
functionality:
* I have a number of Gateways registered at FS1
* I have another number of Gateways registered at FS2
* In case I want to do maintenance on FS1 I would like all
external gateways to be registered on FS2 and then shutdown FS1
* This is not of a problem if I have only a handful of gateways,
but in our case they're about 10.000
* The goal is to minimze downtime, when I migrate e.g. 5000
gateways from FS1 to FS2
* 1st method: The normal way would be to register (via xml-rpc or
socket) the new Gateway on FS2 and then deregister it on FS1.
FS1 sends an unregister (register with expires=0) to the gateway
though (after the register from FS2), so this Gateway
unfortunately no longer sends calls to any of the 2 FS.
* 2nd method: The other way is to deregister them first on FS1 and
then register them all on FS2. Because deregistering and
registering takes time with ~5000 Gateways (+ we have to ensure
that the new register has to take place after unregister), this
results in a significant downtime.
So my question: Is there any way to suppress deregister messages to
the gateway?
Best regards
Peter
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--
David Knell, Director, 3C Limited
T: 020 8114 8901 F: 020 3002 7257 M: 001 415 630 3031
http://www.3c.co.uk
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