[horde] activesync workflow

[cheese at nosuchhost.net]

hi

i would need some clarification how activesync works. i assume:

* activesync is stateless, there works almost "out of the box" behind a 
loadbalancer.

* activesync keeps connections to the mobile device and outlook 2013 for 
long timeranges. there are two parameters:

connectiontimeout=600
timeout=4000

timeout on apache needs to be larger than 
$conf[activesync][ping][heartbeatmax]
apache's timeout means that if no data was sent for 4000 seconds the 
connection is closed. if everything is OK, than this limit should never be 
reached, as we honour hearthbeats?

if i have two hordes behind a loadbalancer, how would i sanely update the 
hordes without having connections disconnected? some devices are quite 
picky with disruptions.

* how long will activesync keep imap-sessions to the backend systems? 
would horde reconnect gracefully if some connection is broken (again 
because of updates on the backend imap-systems), or would it expose that 
disconnections to its clients?

yours
josef