Commit 495af6ca authored by Howard Chu's avatar Howard Chu
Browse files

More backend info updates: MDB, NDB

parent 29dfdb3c
......@@ -1088,7 +1088,8 @@ value "oid.xx" will be used.
.SH GENERAL BACKEND OPTIONS
Options in these entries only apply to the configuration of a single
type of backend. All backends may support this class of options.
type of backend. All backends may support this class of options, but
currently none do.
The entry must be named
.B olcBackend=<databasetype>,cn=config
and must have the olcBackendConfig objectClass.
......@@ -1100,8 +1101,10 @@ should be one of
.BR hdb ,
.BR ldap ,
.BR ldif ,
.BR mdb ,
.BR meta ,
.BR monitor ,
.BR ndb ,
.BR null ,
.BR passwd ,
.BR perl ,
......@@ -1109,7 +1112,8 @@ should be one of
.BR shell ,
or
.BR sql .
At present, no backend implements any options of this type.
At present, no backend implements any options of this type, so this
entry should not be used.
.SH DATABASE OPTIONS
Database options are set in entries named
......
......@@ -53,7 +53,6 @@ This layout stores entry DNs more efficiently than the
backend,
using less space and requiring less work to create, delete, and rename
entries. It is also one of the few backends to support subtree renames.
.BR
.TP
.B ldap
This backend acts as a proxy to forward incoming requests to another
......@@ -65,6 +64,16 @@ of the database, using plain ascii files to store data.
Its usage should be limited to very simple databases, where performance
is not a requirement. This backend also supports subtree renames.
.TP
.B mdb
This will soon be the recommended primary backend, superseding
.BR hdb .
This backend uses OpenLDAP's own MDB transactional database
library. It is extremely compact and extremely efficient, delivering
much higher performance than the Berkeley DB backends while using
significantly less memory. Also, unlike Berkeley DB, MDB is crash proof,
and requires no special tuning or maintenance.
This backend also supports subtree renames.
.TP
.B meta
This backend performs basic LDAP proxying with respect to a set of
remote LDAP servers. It is an enhancement of the
......@@ -80,7 +89,8 @@ backend may be defined.
.B ndb
This backend is experimental.
It uses the transactional database interface of the MySQL Cluster Engine
(NDB) to store data.
(NDB) to store data. Note that Oracle, which now owns MySQL, has withdrawn
support for NDB and this backend is unlikely to be developed any further.
.TP
.B null
Operations in this backend succeed but do nothing.
......@@ -131,8 +141,10 @@ default slapd configuration directory
.BR slapd\-hdb (5),
.BR slapd\-ldap (5),
.BR slapd\-ldif (5),
.BR slapd\-mdb (5),
.BR slapd\-meta (5),
.BR slapd\-monitor (5),
.BR slapd\-ndb (5),
.BR slapd\-null (5),
.BR slapd\-passwd (5),
.BR slapd\-perl (5),
......
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