ldap design

Hello People,

I'm in doubt what design I need to use for openldap This is the situation;

We have 1200+ customers using LDAP. We want to replicate all these ldap server to 1 big ldapserver in a datacentre with a multi-master config. So all the customers are a master-ldap who replicate to the datacentre.

My idea was to build in the datacentre a ldapcluster of about 4 server

My question is: Will this be stable, because there will be 1200+ ldapservers replicating to 4 ldapserver in the datacentre.

I know this depends on the number of write actions at the customers. All I can say is that write actions at the customers isn't THAT much.

I really hope somebody can give me an answer or maybe there's somebody else with the same config

Best Regards