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Chapter 3. Plug-in Implemented Server Functionality Reference

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dbfilepageout

This attribute gives the number of pages for this file written from cache to disk.

3.4.7. Database Attributes under cn=index, cn=NetscapeRoot,

cn=ldbm database, cn=plugins, cn=config and cn=index,

cn=UserRoot, cn=ldbm database, cn=plugins, cn=config

In addition to the set of default indexes that are stored under cn=default indexes, cn=config,

cn=ldbm database, cn=plugins, cn=config, custom indexes can be created for

o=NetscapeRoot, o=UserRoot, and user-defined backend instances; these are stored under

cn=index, cn=database_name, cn=ldbm database, cn=plugins, cn=config. Each indexed

attribute represents a subentry under the cn=config information tree nodes, as shown in the

following diagram:

Figure 3.2. Indexed Attribute Representing a Subentry

For example, the index file for the aci attribute under o=UserRoot appears in the Directory Server as

follows:

dn:cn=aci, cn=index, cn=UserRoot, cn=ldbm database, cn=plugins, cn=config

objectclass:top

objectclass:nsIndex

cn:aci

nsSystemIndex:true

nsIndexType:pres

These entries share all of the indexing attributes listed for the default indexes in Section 3.4.5,

“Database Attributes under cn=default indexes, cn=config, cn=ldbm database, cn=plugins, cn=config”.

For further information about indexes, refer to the "Managing Indexes" chapter in the Directory Server

Administrator's Guide.

3.4.7.1. nsSubStrBegin

By default, for a search to be indexed, the search string must be at least three characters long, without

counting any wildcard characters. For example, the string abc would be an indexed search while ab*

would not be. Indexed searches are significantly faster than unindexed searches, so changing the

minimum length of the search key is helpful to increase the number of indexed searches.

This substring length can be edited based on the position of any wildcard characters. The

nsSubStrBegin attribute sets the required number of characters for an indexed search for the

beginning of a search string, before the wildcard. For example:

abc*

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Red Hat 8.1 User Manual Page 206