Minimizing broadcast searches

You can control searches in the following ways:

Define a central directory server to minimize the number of broadcast searches.
Register resources to a directory database.
Manage duplicate resource definition.

Search reduction also limits broadcast searches for unreachable viable resources in the network. See Improving VTAM performance using start options for additional information about search reduction.

Also, an installation-wide directory services management exit provides control over the extent to which VTAM® conducts search requests in the network in which the directory services management exit is loaded. The directory services management exit is the interface between VTAM directory services and user-written code. VTAM conducts searches based on steps authorized by the user code. For more information about the directory services management exit, see z/OS Communications Server: SNA Customization.