Red Hat 8.1 - Manual (Page 65)

This attribute controls the maximum age of deleted entries (tombstone entries) and state information.
The Directory Server stores tombstone entries and state information so that when a conflict occurs in a
multi-master replication process, the server resolves the conflicts based on the timestamp and replica ID
stored in the change sequence numbers.
An internal Directory Server housekeeping operation periodically removes tombstone entries which are
older than the value of this attribute (in seconds). State information which is older than the
nsDS5ReplicaPurgeDelay value is removed when an entry which contains the the state information is
modified.
Not every tombstone and state information may be removed because, with multi-master replication, the
server may need to keep a small number of the latest updates to prime replication, even if they are older
than the value of the attribute.
This attribute specifies the interval, in seconds, to perform internal purge operations on an entry. When
setting this attribute, ensure that the purge delay is longer than the longest replication cycle in the
replication policy to preserve enough information to resolve replication conflicts and to prevent the
copies of data stored in different servers from diverging.
Parameter Description
Entry DN cn=replica, cn=suffixDN, cn=mapping tree,
cn=config
Valid Range 0 (keep forever) to maximum 32-bit integer
(2147483647)
Default Value 604800 [1 week (60x60x24x7)]
Syntax Integer
Example nsDS5ReplicaPurgeDelay: 604800
2.3.7.11. nsDS5ReplicaReferral
This multi-valued attribute specifies the user-defined referrals. This should only be defined on a
consumer. User referrals are only returned when a client attempts to modify data on a read-only
consumer. This optional referral overrides the referral that is automatically configured by the consumer
by the replication protocol.
Parameter Description
Entry DN cn=replica, cn=suffixDN, cn=mapping tree,
cn=config
Valid Values Any valid LDAP URL
Default Value
Syntax
DirectoryString
Example nsDS5ReplicaReferral: ldap://ldap.example.com
2.3.7.12. nsDS5ReplicaRoot
This attribute sets the DN at the root of a replicated area. This attribute must have the same value as
the suffix of the database being replicated and cannot be modified.
Parameter Description
Entry DN cn=replica, cn=suffixDN, cn=mapping tree,
cn=config
Valid Values Suffix of the database being replicated, which is
the suffix DN
Default Value
Syntax
DirectoryString
Example nsDS5ReplicaRoot: "dc=example,dc=com"
2.3.7.13. nsDS5ReplicaTombstonePurgeInterval
This attribute specifies the time interval in seconds between purge operation cycles.
Periodically, the server runs an internal housekeeping operation to purge old update and state
information from the changelog and the main database. See
Section 2.3.7.10,
“nsDS5ReplicaPurgeDelay” .
When setting this attribute, remember that the purge operation is time-consuming, especially if the server
handles many delete operations from clients and suppliers.
Parameter Description
Entry DN cn=replica, cn=suffixDN, cn=mapping tree,
Red Hat Directory Server 8.1 Configuration and Command Reference
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