slapo-syncprov - Sync Provider overlay to slapd
/etc/ldap/slapd.conf
The Sync Provider overlay implements the provider-side support for the LDAP
Content Synchronization (RFC4533) as well as syncrepl replication support. The
overlay can be used with any backend that maintains entryCSN and entryUUID
attributes for its entries. It also creates a contextCSN attribute in the root
entry of the database.
The contextCSN is updated for every write operation performed against the
database. To reduce database contention, the contextCSN is only updated in
memory. The value is written to the database on server shutdown and read into
memory on startup, and maintained in memory thereafter. Checkpoints may be
configured to write the contextCSN into the underlying database to minimize
recovery time after an unclean shutdown.
On databases that support inequality indexing, it is highly recommended to set
an eq index on the entryCSN attribute when using this overlay.
These
slapd.conf options apply to the Sync Provider overlay. They should
appear after the
overlay directive.
- syncprov-checkpoint <ops> <minutes>
- After a write operation has succeeded, write the contextCSN
to the underlying database if <ops> write operations or more
than <minutes> time have passed since the last checkpoint.
Checkpointing is disabled by default.
- syncprov-sessionlog <ops>
- Configures an in-memory session log for recording
information about write operations made on the database. The
<ops> specifies the number of operations that are recorded in
the log. All write operations (except Adds) are recorded in the log. When
using the session log, it is helpful to set an eq index on the entryUUID
attribute in the underlying database.
- syncprov-sessionlog-source <dn>
- Should not be set when syncprov-sessionlog is set and vice
versa.
When accesslog for this database is configured and is logging at this
suffix, it can be used as the session log source instead of the in-memory
session log mentioned above. This log has the advantage of not starting
afresh every time the server is restarted.
- syncprov-nopresent TRUE | FALSE
- Specify that the Present phase of refreshing should be
skipped. This value should only be set TRUE for a syncprov instance on top
of a log database (such as one managed by the accesslog overlay). The
default is FALSE.
- syncprov-reloadhint TRUE | FALSE
- Specify that the overlay should honor the reloadHint flag
in the Sync Control. It must be set TRUE when using the accesslog overlay
for delta-based syncrepl replication support. The default is FALSE.
- /etc/ldap/slapd.conf
- default slapd configuration file
slapd.conf(5),
slapd-config(5),
slapo-accesslog(5).
OpenLDAP Administrator's Guide.
OpenLDAP Software is developed and maintained by The OpenLDAP Project
<
http://www.openldap.org/>.
OpenLDAP Software is derived from the
University of Michigan LDAP 3.3 Release.