Sun Java System Directory Server Enterprise Edition 6.3 Migration Guide

New Replication Recommendations

Directory Server 6.3 does not limit the number of masters in a multi-master topology. A fully-meshed, multi-master topology with no hubs or consumers is recommended in most cases.

Advantages of an all-master topology include the following:

There may be reasons that an all-master topology is not viable in a specific deployment. For example, fractional replication cannot be used in an all-master topology because fractional replication is only supported from masters to consumers.