Am 30.05.2014 um 13:49 schrieb Arnt Gulbrandsen <[email protected]>:

> The mailbox ID and message UID (a number) form a natural complex primary key. 
> If two separated masters write to the database, then they will either have a 
> problem merging because of conflicting primary keys, or the clients will have 
> a cache accuracy problem. However, I know a way around it, with probably even 
> very good performance.
I’m usually using primary key sequences with increment > 1 for that (1,3,5,7 on 
primary server, 2,4,6,8 on secondary).

Axel
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