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SLAPO-SYNCPROV(5)                                                                          SLAPO-SYNCPROV(5)



NAME
       slapo-syncprov - Sync Provider overlay to slapd

SYNOPSIS
       /etc/openldap/slapd.conf

DESCRIPTION
       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  data-base database
       base  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 helpful to set  an  eq  index  on  the  entryCSN
       attribute when using this overlay.

CONFIGURATION
       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-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. In OpenLDAP
              releases 2.3.11 and earlier the syncrepl consumer did not properly set this flag, so the over-lay overlay
              lay must ignore it. This option should be set TRUE when working with newer releases that prop-erly properly
              erly support this flag. It must be set TRUE when using the accesslog overlay  for  delta-based
              syncrepl replication support.  The default is FALSE.

FILES
       /etc/openldap/slapd.conf
              default slapd configuration file

SEE ALSO
       slapd.conf(5), slapd-config(5), slapo-accesslog(5).  OpenLDAP Administrator's Guide.

ACKNOWLEDGEMENTS
       OpenLDAP  Software  is  developed  and maintained by The OpenLDAP Project <http://www.openldap.org/>.
       OpenLDAP Software is derived from University of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.28                                  2011/11/24                                SLAPO-SYNCPROV(5)