Novell EDIRECTORY 8.8 SP3, Administration Manual, Page: 383 / 634

Configuring LDAP Services for Novell eDirectory 383
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This attribute advertises the superior referral for the DSA. This value is administered by
updating the ldapReferral attribute on the LDAP Server or LDAP Group object.
14.9 Persistent Search: Configuring for
eDirectory Events
Novell eDirectory has an event service that enables applications to be notified of significant events
that occur within the Directory. Some of these events are general events that can pertain to any
Directory service. Other events are specific to eDirectory and its special features.
eDirectory events are exposed to applications through two different extensions to the LDAP
protocol:
Š
An implementation of the Persistent Search Control
The Persistent Search feature of Novell eDirectory is a search operation that keeps going after
the initial set of matching entries is returned. Persistent Search is an extension to the LDAP v3
search operation that moves the burden of checking for updates within a search result set from
the client to the server. The Persistent Search control allows the client to perform a normal
LDAP search operation (specifying the base DN, scope of search, search filter, and so on) and
then, rather than having the server return a SearchResultDone message at the end, the operation
maintains a connection so the client can be updated each time an entry in the result set changes.
This allows the client to maintain a cache of the entries it is interested in, or trigger some logic
whenever an update occurs.
The “Persistent Search” document on the Internet (http://www.ietf.org/proceedings/01mar/I-D/
ldapext-psearch-03.txt) describes this extension in further detail.
Š Monitor Events (an extended LDAP operation that is specific to eDirectory)
Applications that use eDirectory event services can place a heavy computational load on the
directory. Various administrative parameters are available to help control how event services are
used on individual eDirectory servers. These parameters are stored on the LDAP Server object. You
use ConsoleOne or Novell iManager to set these parameters.
Specific applications that use the event service might require that you set these parameters to
specific values. The documentation for such applications will indicate specific requirements for the
application.
For more information, see Understanding and Using Persistent Search in Novell eDirectory (http://
developer.novell.com/research/appnotes/2003/february/04/a030204.htm) .
14.9.1 Managing Persistent Searches
You can use Novell iManager to view or edit persistent searches.
1 In Novell iManager, click the Roles and Tasks button Description: Roles and Tasks button .
2 Click eDirectory Administration > Modify Object .
3 Enter the name and context of the LDAP server object you want to modify, or click
Description: Browse button and browse or search for the LDAP server object.