A GDS machine can be configured in two ways:
· Client Only
A node can contain only the client side of GDS. This node can access remote DSAs and cache information in the DUA cache.
· Client/Server
A machine can be configured with both the GDS client and server. This is the typical configuration for a machine acting as a GDS server. This
configuration can be useful even if a node acts mainly as a client because the DSA can be used as a larger, more permanent cache of information contained in remote DSAs.
Note: When a client and server reside on the same machine, access to the directory is optimized. Communications between the DUA and the DSA are by means of interprocess communications (IPC) via shared memory.