Sun Java System Directory Server Enterprise Edition 6.0 Reference

System Indexes and Default Indexes

This section addresses the following topics:

System Indexes

System indexes are required for Directory Server to function properly and efficiently. System indexes cannot be deleted or modified. Table 6–1 lists the system indexes created automatically in every suffix.

Table 6–1 System Indexes in Every Suffix


Attribute	Equality Index	Presence Index	Description
`aci`		X	Allows the directory server to quickly obtain the access control information maintained in the directory
`ancestorid`	X		Enhances directory performance during subtree searches
`entrydn`	X		Speeds up entry retrieval based on DN searches
`id2entry`	X		Contains the actual database of directory entries. All other database files can be recreated from this one
`nsUniqueId`	X		Used to search for specific entries
`nscpEntryDN`	X		Used internally in Directory Server for replication
`nsds5ReplConflict`	X	X	Helps to find replication conflicts
`numsubordinates`		X	Used by Directory Service Control Center to enhance display performance on the Directory tab
`objectClass`	X		Accelerate subtree searches
`parentID`	X		Enhances directory performance during one-level searches

Default Indexes

When you create a new suffix in your directory, the server configures a set of default indexes in the corresponding database directory. The default indexes can be modified depending on your indexing needs, although you should ensure that no server plug-ins or other servers in your enterprise depend on an indexed attribute before you eliminate index.

Table 6–2 lists the default indexes that are configured in Directory Server.

Table 6–2 Default Indexes in Every New Suffix


Attribute	Equality Index	Presence Index	Substring Index	Description
`cn`	X	X	X	Improves the performance of the most common types of directory searches.
`givenName`	X	X	X	Improves the performance of the most common types of directory searches.
`mail`	X	X	X	Improves the performance of the most common types of directory searches.
`mailAlternateAddress`	X			Used by Messaging Server.
`mailHost`	X			Used by Messaging Server.
`member`	X			Improves server performance. This index is also used by the referential integrity plug-in.
`nsCalXItemId`	X	X	X	Used by Calendar Server.
`nsLIProfileName`	X			Used by roaming feature of Messaging Server.
`nsRoleDN`	X			Improves the performance of role-based operations.
`nswcalCALID`	X			Used by Calendar Server.
`owner`	X			Improves server performance. This index is also used by the referential integrity plug-in.
`pipstatus`	X			Used by other servers.
`pipuid`		X		Used by other servers.
`seeAlso`	X			Improves server performance. This index is used by the referential integrity plug-in.
`sn`	X	X	X	Improves the performance of the most common types of user directory searches.
`telephoneNumber`	X	X	X	Improves the performance of the most common types of user directory searches.
`uid`	X			Improves server performance.
`uniquemember`	X			Improves server performance. This index is also used by the referential integrity plug-in.