Chapter 5. Root DSE attributes

This attribute contains a timestamp which shows the most recent edit time for any data in the directory.

dataversion: 020090923175302020090923175302

dataversion: 020090923175302020090923175302

Corresponds to the naming context, out of all configured naming contexts, which clients should use by default.

The USN Plug-in assigns a sequence number to every entry whenever a write operation — add, modify, delete, and modrdn — is performed for that entry. The USN is assigned in the entryUSN operational attribute for the entry.

The USN Plug-in has two modes: local and global.

In local mode, each database maintained for a server instance has its own instance of the USN Plug-in with a separate USN counter per back end database. The most recent USN assigned for any entry in the database is displayed in the lastusn attribute. When the USN Plug-in is set to local mode, the lastUSN attribute shows both the database which assigned the USN and the USN:

lastusn;pass:quotes[database_name]:pass:quotes[USN]

lastusn;pass:quotes[database_name]:pass:quotes[USN]

For example:

lastusn;example1: 213
lastusn;example2: 207

lastusn;example1: 213
lastusn;example2: 207

In global mode, when the database uses a shared USN counter, the lastUSN value shows the latest USN assigned by any database:

lastusn: 420

lastusn: 420

Corresponds to a naming context the server is controlling or shadowing. When Directory Server does not control any information (such as when it is an LDAP gateway to a public X.500 directory), this attribute is absent. When Directory Server believes it contains the entire directory, the attribute has a single value, and that value is the empty string (indicating the null DN of the root).This attribute permits a client contacting a server to choose suitable base objects for searching.

This attribute contains the DN for the top suffix of the directory tree for machine data maintained in the server. The DN itself points to an LDAP URL. For example:

cn=ldap://dc=pass:quotes[server_name],dc=example,dc=com:389

cn=ldap://dc=pass:quotes[server_name],dc=example,dc=com:389

The values of this attribute are the object identifiers (OIDs) that identify the controls supported by the server. When the server does not support controls, this attribute is absent.

The values of this attribute are the object identifiers (OIDs) that identify the extended operations supported by the server. When the server does not support extended operations, this attribute is absent.

This attribute contains features supported by the current version of Red Hat Directory Server.

This attribute identifies the versions of the LDAP protocol implemented by the server.

This attribute identifies the names of the SASL mechanisms supported by the server. When the server does not support SASL attributes, this attribute is absent.

This attribute contains the name of the server vendor.

This attribute shows the vendor’s version number for the server.

{context}