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About Indexes
Chapter
10
Managing Indexes
351
Overview of Standard Indexes
Because of the need to maintain default indexes and other internal indexing
mechanisms, the Directory Server also maintains certain standard index files. The
following standard indexes exist by default, and you do not need to generate them:
•
id2entry.db3
—contains the actual directory database entries. All other
database files can be recreated from this one.
•
id2children.db3
—restricts the scope of one-level searches, that is, searches
that examine an entry’s immediate children.
•
dn.db3
—controls the scope of subtree searches; that is, searches that examine
an entry and all the entries in the subtree beneath it.
•
dn2id.db3
—begins all searches efficiently by mapping an entry’s
distinguished name to its ID number.
Overview of the Searching Algorithm
Indexes are used to speed up searches. To understand how the directory uses
indexes, it helps to understand the searching algorithm. Each index contains a list
of attributes (such as the
cn
, common name, attribute) and a pointer to the entries
corresponding to each value. Directory Server processes a search request as
follows:
1.
An LDAP client application, such as Netscape Communicator or Directory
Server Gateway sends a search request to the directory.
dnComp
X
Used to help accelerate subtree searches in the
directory.
objectClass
X
Used to help accelerate subtree searches in the
directory.
entryDN
X
Speeds up entry retrieval based on DN searches.
parentID
X
Enhances directory performance during one-level
searches.
numSubordinates
X
Used by the Directory Server Console to enhance
display performance on the Directory tab.
nsUniqueID
X
Used to search for specific entries.
Table 10-2
System indexes (Continued)
Attribute
Eq
Pres
Purpose
Содержание NETSCAPE DIRECTORY SERVER 6.1 - ADMINISTRATOR
Страница 1: ...Administrator s Guide Netscape Directory Server Version6 1 August 2002...
Страница 20: ...20 Netscape Directory Server Administrator s Guide August 2002...
Страница 24: ...24 Netscape Directory Server Administrator s Guide August 2002...
Страница 44: ...Starting the Server in Referral Mode 44 Netscape Directory Server Administrator s Guide August 2002...
Страница 78: ...Maintaining Referential Integrity 78 Netscape Directory Server Administrator s Guide August 2002...
Страница 142: ...Using Referrals 142 Netscape Directory Server Administrator s Guide August 2002...
Страница 162: ...Enabling and Disabling Read Only Mode 162 Netscape Directory Server Administrator s Guide August 2002...
Страница 278: ...Setting Resource Limits Based on the Bind DN 278 Netscape Directory Server Administrator s Guide August 2002...
Страница 336: ...Troubleshooting Replication Related Problems 336 Netscape Directory Server Administrator s Guide August 2002...
Страница 396: ...Configuring LDAP Clients to Use SSL 396 Netscape Directory Server Administrator s Guide August 2002...
Страница 418: ...Monitoring Database Link Activity 418 Netscape Directory Server Administrator s Guide August 2002...
Страница 440: ...Miscellaneous Tuning Tips 440 Netscape Directory Server Administrator s Guide August 2002...
Страница 442: ...442 Netscape Directory Server Administrator s Guide August 2002...
Страница 478: ...PTA Plug In Syntax Examples 478 Netscape Directory Server Administrator s Guide August 2002...
Страница 498: ...498 Netscape Directory Server Administrator s Guide August 2002...
Страница 512: ...Storing Information in Multiple Languages 512 Netscape Directory Server Administrator s Guide August 2002...
Страница 532: ...Searching an Internationalized Directory 532 Netscape Directory Server Administrator s Guide August 2002...
Страница 538: ...Examples of LDAP URLs 538 Netscape Directory Server Administrator s Guide August 2002...