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SLAPO-SYNCPROV(5)


NAME

  slapo-syncprov - Sync Provider overlay


SYNOPSIS

  /usr/internet/openldap/etc/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 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.

  Note that due to deadlock constraints in the LDBM database, this overlay
  will only work in RefreshOnly mode, and cannot perform checkpoints, on
  LDBM.

  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>
       Specify a 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 overlay must ignore it. This
       option should be set TRUE when working with newer releases that
       properly support this flag. It must be set TRUE when using the
       accesslog overlay for delta-based syncrepl support.  The default is
       FALSE.


FILES

  /usr/internet/openldap/etc/slapd.conf
       default slapd configuration file


SEE ALSO

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

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