Menu Close
Settings Close

Language and Page Formatting Options

13.2. Creating Standard Indexes

This section describes how to create presence, equality, approximate, substring, and international indexes for specific attributes using the command line and the web console.


When you create a new index type, Directory Server uses this default index as a template for each new database that will be created in future. If you update the default index, the updated settings are not applied to existing databases. To apply a new index to an existing database, use the dsctl db2index command or a cn=index,cn=tasks task, as described in Section 13.3, “Creating New Indexes to Existing Databases”.

13.2.1. Creating Indexes Using the Command Line


You cannot create new system indexes because system indexes are hard-coded in Directory Server.
Use ldapmodify to add the new index attributes to your directory.
  • To create a new index that will become one of the default indexes, add the new index attributes to the cn=default indexes,cn=config,cn=ldbm database,cn=plugins,cn=config entry.
  • To create a new index for a particular database, add it to the cn=index,cn=database_name,cn=ldbm database,cn=plugins,cn=config entry, where cn=database_name corresponds to the name of the database.


Avoid creating entries under cn=config in the dse.ldif file. The cn=config entry in the dse.ldif configuration file is not stored in the same highly scalable database as regular entries. As a result, if many entries, particularly entries that are likely to be updated frequently, are stored under cn=config, performance will probably suffer. Although we recommend you do not store simple user entries under cn=config for performance reasons, it can be useful to store special user entries such as the Directory Manager entry or replication manager (supplier bind DN) entry under cn=config since this centralizes configuration information.
For information on the LDIF update statements required to add entries, see Section 3.1.4, “Updating a Directory Entry”.
For example, to create presence, equality, and substring indexes for the sn (surname) attribute in the Example1 database:
  1. Run ldapmodify and add the LDIF entry for the new indexes:
    # ldapmodify -a -D "cn=Directory Manager" -W -p 389 -h -x
    dn: cn=sn,cn=index,cn=Example1,cn=ldbm database,cn=plugins,cn=config
    changetype: add
    The cn attribute contains the name of the attribute to index, in this example the sn attribute. The entry is a member of the nsIndex object class. The nsSystemIndex attribute is false, indicating that the index is not essential to Directory Server operations. The multi-valued nsIndexType attribute specifies the presence (pres), equality (eq) and substring (sub) indexes. Each keyword has to be entered on a separate line. The nsMatchingRule attribute in the example specifies the OID of the Bulgarian collation order; the matching rule can indicate any possible value match, such as languages or other formats like date or integer.
    You can use the keyword none in the nsIndexType attribute to specify that no indexes are to be maintained for the attribute. This example temporarily disables the sn indexes on the Example1 database by changing the nsIndexType to none:
    dn: cn=sn,cn=index,cn=Example1,cn=ldbm database,cn=plugins,cn=config
For a complete list of matching rules and their OIDs, see Section 14.3.4, “Using Matching Rules”, and for the index configuration attributes, see the Red Hat Directory Server Configuration, Command, and File Reference.


Always use the attribute's primary name (not the attribute's alias) when creating indexes. The primary name of the attribute is the first name listed for the attribute in the schema; for example, uid for the user ID attribute.

13.2.2. Creating Indexes Using the Web Console

To create presence, equality, approximate, substring, or international indexes:
  1. Open the Directory Server user interface in the web console. See Section 1.4, “Logging Into Directory Server Using the Web Console”.
  2. Select the instance.
  3. Open the Database menu.
  4. Select the suffix entry.
  5. Open the Indexes tab.
  6. Click the Add Index button.
  7. Select the attribute to index, the type of index, and optionally a matching rule.
  8. Click Create Index.