OSF DCE Administration Guide--Core Components

OSF DCE Administration Guide—Core Components
Client
CDS clerk
Node A
CDS server
GDA
1
2
3
4
Node B
Node C
?
?
= Request path
= Response path
LEGEND
GDA is at
Node C
The following steps summarize the GDA search that is illustrated in the preceding figure:
1. On Node A, a client application passes a global name, beginning with the /...
prefix, to the CDS clerk.
2. The clerk passes the lookup request to a CDS server that it knows about on Node
B.
3. The server’s clearinghouse contains a replica of the cell root directory, so the
server reads the CDS_GDAPointers attribute and returns the address of Node C,
where a GDA is running.
4. The clerk passes the lookup request to the GDA.
Figure 22-2 shows how CDS and a GDA interact to find a name in a foreign cell that is
defined in DNS. Suppose the name is /.../widget.com/printsrv1, which represents a print
server in the foreign cell.
Figure 22-2. How the GDA Helps CDS Find a Name
22 − 2 Tandem Computers Incorporated 124243