2004-12-05 04:42:04 +08:00
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.TH SLAPO-SYNCPROV 5 "RELEASEDATE" "OpenLDAP LDVERSION"
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2005-01-02 04:49:32 +08:00
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.\" Copyright 2004-2005 The OpenLDAP Foundation All Rights Reserved.
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2004-12-05 04:42:04 +08:00
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.\" $OpenLDAP$
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.SH NAME
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slapo-syncprov \- Syncrepl Provider overlay
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.SH SYNOPSIS
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ETCDIR/slapd.conf
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.SH DESCRIPTION
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The Syncrepl Provider overlay implements the provider-side support for
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syncrepl replication, including persistent search functionality. The overlay
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can be used with any backend that maintains entryCSN and entryUUID
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attributes for its entries. It also creates a contextCSN attribute in
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the root entry of the database.
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The contextCSN is updated for every write operation performed against the
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database. To reduce database contention, the contextCSN is only updated in
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2005-07-04 14:57:10 +08:00
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memory. The value is written to the database on server shutdown and read into
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memory on startup, and maintained in memory thereafter. Checkpoints may be
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configured to write the contextCSN into the underlying database to minimize
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recovery time after an unclean shutdown.
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Note that due to deadlock constraints in the LDBM database, this overlay
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will only work in RefreshOnly mode, and cannot perform checkpoints, on LDBM.
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On databases that support inequality indexing, it is helpful to set an
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eq index on the entryCSN attribute when using this overlay.
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.SH CONFIGURATION
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These
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.B slapd.conf
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options apply to the Syncrepl Provider overlay.
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They should appear after the
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.B overlay
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directive and before any subsequent
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.B database
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directive.
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.TP
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.B syncprov-checkpoint <ops> <minutes>
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After a write operation has succeeded, write the contextCSN to the underlying
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2005-08-14 16:20:54 +08:00
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database if
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.B <ops>
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write operations or more than
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.B <minutes>
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time have passed
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2004-12-05 04:42:04 +08:00
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since the last checkpoint. Checkpointing is disabled by default.
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2004-12-08 12:57:43 +08:00
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.TP
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.B syncprov-sessionlog <ops>
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Specify a session log for recording information about write operations made
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on the database. The
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.B <ops>
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specifies the number of operations that are recorded in the log. All write
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operations (except Adds) are recorded in the log.
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2004-12-08 12:57:43 +08:00
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When using the session log, it is helpful to set an eq index on the
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entryUUID attribute in the underlying database.
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2004-12-05 04:42:04 +08:00
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.SH FILES
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.TP
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ETCDIR/slapd.conf
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default slapd configuration file
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.SH SEE ALSO
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.BR slapd.conf (5).
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2004-12-08 12:57:43 +08:00
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OpenLDAP Administrator's Guide.
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