Is there a need for Partial Replication ?

Partial replication is the possibility to replicate only a subset of a DIT. It can be Fractional Replication (Subset of attributes per entry), Sparse (Subset of entries) or Subtree (Only a portion of the tree).
If you have needs for partial replication, it is time to discuss with us about your requirements, your replication scenarios...
Ludovic Poitou
Directory Server Replication Architect.

There are a number of situations where partial replication would be beneficial to most organizations.
Fractional:
Various differing national laws prevent companies from sending personal information (such as home addresses and telephone numbers, and government identification numbers) into or outside of particular countries. If you wish to geographically distribute your directory services for performance reasons, non-fractional replication would make that a manual or scheduled process, likely with an LDIF intermediary of some kind. From our perspective, the need for this type of partial replication is greatest.
Sparse:
This could again be useful for companies with geographical data distribution concerns, or with specialized/purposed directory servers. How would this be accomplished - using LDAP search filters, or some other method?
Subtree:
We would be particularly interested in this type of replication for security reasons. For example, we want to have sensitive authentication/authorization information used for private administrative applications or high-security applications (such as a PKI) stored only on secured servers over which we have physical control. This would also allow us to deploy single-purpose servers (containing only a subset of our entries) where creating an additional database is not a viable option.
As our environments grow, in number of servers and in global reach, the ability to perform replication in "untraditional" (<i>i.e.</i>, non-database) ways becomes a significant product differentiator.

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