Retro Changelog Plug-In Attributes; Nsslapd-Changelogdir; Nsslapd-Changelogmaxage (Max Changelog Age) - Red Hat DIRECTORY SERVER 8.1 Command Reference Manual

3.6. Retro Changelog Plug-in Attributes

Two different types of changelogs are maintained by Directory Server. The first type, referred to as
simply a changelog, is used by multi-master replication, and the second changelog, a plug-in referred
to as the retro changelog, is intended for use by LDAP clients for maintaining application compatibility
with Directory Server 4.x versions.
This Retro Changelog Plug-in is used to record modifications made to a supplier server. When the
supplier server's directory is modified, an entry is written to the Retro Changelog that contains both of
the following:
• A number that uniquely identifies the modification. This number is sequential with respect to other
entries in the changelog.
• The modification action; that is, exactly how the directory was modified.
It is through the Retro Changelog Plug-in that the changes performed to the Directory Server are
accessed using searches to cn=changelog suffix.

3.6.1. nsslapd-changelogdir

This attribute specifies the name of the directory in which the changelog database is created the first
time the plug-in is run. By default, the database is stored with all the other databases under /var/
lib/dirsrv/slapd-instance_name/changelogdb.
NOTE
For performance reasons, store this database on a different physical disk.
The server has to be restarted for changes to this attribute to go into effect.
Parameter
Entry DN
Valid Values
Default Value
Syntax
Example

3.6.2. nsslapd-changelogmaxage (Max Changelog Age)

This attribute specifies the maximum age of any entry in the changelog. The changelog contains
a record for each directory modification and is used when synchronizing consumer servers. Each
record contains a timestamp. Any record with a timestamp that is older than the value specified in this
attribute is removed. If this attribute is absent, there is no age limit on changelog records, which is the
default behavior since this attribute is not present by default.
Retro Changelog Plug-in Attributes
Description
cn=Retro Changelog Plugin, cn=plugins,
cn=config
Any valid path to the directory
None
DirectoryString
nsslapd-changelogdir: /var/lib/dirsrv/
slapd-instance_name/changelogdb
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