Specifications
Chapter 2 Open Directory Search Policies 33
Each class (English, math, science) has its own computer. The students in each class are
dened as users in the local domain of that class’s computer. All three of these local
domains have the same shared domain, in which all instructors are dened.
Instructors, as members of the shared domain, can log in to all class computers.
The students in each local domain can log in to only the computer where their local
account resides.
Local domains reside on their respective computers but a shared domain resides on a
server accessible from the local domain’s computer. When an instructor logs in to any
of the three class computers and cannot be found in the local domain, Open Directory
searches the shared domain.
In the following example, there is only one shared domain, but in more complex
networks, there may be more shared domains.
School Mac OS X
Server
English class
computer
Math class
computer
Science class
computer
Local
directory
domain
Local
directory
domain
Local
directory
domain
Local
directory
domain
Shared
directory
domain
Multilevel Search Policies
If more than one server on the network hosts a shared directory, the computers on the
network can include two or more shared directories in their search policies.
As with simpler search policies, Open Directory looks for user information and other
administrative data rst in the local directory domain. If Open Directory does not
nd the information it needs in the local directory domain, it searches each shared
directory in the sequence specied by the search policy.