worldwide servers

[lfasci]

Hi

I want to install 3 zimbra server in 3 different location, these are
connected using VPN, my idea is to use a master LDAP and two replicas.
In the main location there will be master ldap,mta,store in remote sites
ldap-replica,mta,store.
One of my problems is the logger, if I want to see the servers' status I have to enable it but because I can have only one logger I will have a lot of
traffic on the VPNs, is there a way to avoid this ?
Do yuo have any suggestion/documentation for this kind of installation ?

thank you