OpenDJ can perform fractional replication, whereby you specify the attributes to include in or to exclude from the replication process.
You set fractional replication configuration as
fractional-include or
fractional-exclude properties for a replication
domain. When you include attributes, the attributes that are required on
the relevant object classes are also included, whether you specify them
or not. When you exclude attributes, the excluded attributes must be
optional attributes for the relevant object classes. Fractional
replicas still respect schema definitions.
Fractional replication works by filtering objects at the replication server. Initialize replication as you would normally. Of course you cannot create a full replica from a replica with only a subset of the data. If you must prevent data from being replicated across a national boundary, split the replication server handling the updates from the directory servers receiving the updates as described in Procedure 9.6, “To Set Up a Stand-alone Replication Server”.
For example, you might configure an externally facing
fractional replica to include only some inetOrgPerson
attributes.
$ dsconfig set-replication-domain-prop --port 4444 --hostname opendj.example.com --bindDN "cn=Directory Manager" --bindPassword password --provider-name "Multimaster Synchronization" --domain-name "dc=example,dc=com" --trustAll --no-prompt --set fractional-include:inetorgperson:cn,givenname,mail,mobile,sn,telephonenumber
As another example, you might exclude a custom attribute called
sessionToken from being replicated.
$ dsconfig set-replication-domain-prop --port 4444 --hostname opendj.example.com --bindDN "cn=Directory Manager" --bindPassword password --provider-name "Multimaster Synchronization" --domain-name "dc=example,dc=com" --set fractional-exclude:*:sessionToken --trustAll --no-prompt
This last example only works if you first define a
sessionToken attribute in the directory server
schema.
