OSF DCE Administration Guide--Introduction

OSF DCE Administration Guide—Introduction

• Per-machine utilities

— These utilities are the gdsipcchk and gdssysadm programs, which are described

in Section 3.1.6.

You can have more than one GDS server (DSA) running in your cell. If you have more

than one DSA, the data in the Directory Information Base (DIB), which is the GDS

database, can be partitioned by storing a different part of the DIB on each server.

Alternatively, the data can be replicated by storing copies of the DIB on several

machines. A combination of partitioning and replication can also be used.

You need to plan what information you want to replicate and how the information is

distributed. The master DSA is the only place where writes and updates can occur.

Although you can access the master DSA from any client machine, if the master is

unavailable no updates can be made. Therefore, you need to choose a dependable

machine to run the master DSA. By creating shadows (replicas) of the master DSA you

increase the reliability of read operations. By strategically placing shadows on the

network you can improve access time for users.

Keep the following considerations in mind when planning for a DCE conﬁguration that

includes GDS:

• The initial installation takes approximately 20 megabytes. One database entry

requires approximately 7 kilobytes. You must consider and allocate additional disk

space depending on the amount of information you want to store in your directory.

• You must understand how CDS cell-related information is entered and displayed

using the gsdcp program. (See the for a description of the masks (menus) you use to

enter this information.)

• You must know the IP address, port number (together, these two pieces of

information are called the PSAP), and the cell name for each machine that has a

DSA. (See the for information about entering and displaying PSAP addresses using

the gdsditadm or gdscacheadm GDS administration program.)

3.2.8 DFSServer Programs

DCE supports conﬁguration of the following types of DFS server machines:

• DFS-private File Server machine

• System Control machine

• File Server machine

• Fileset Location Database (FLDB) machine

The following programs are installed on a basic DFS-private File Server machine:

bos, bosserver, dfsbind, dfsexport, epimount, fts, ftserver, fxd, repserver, salvage

The following program is installed on the basic DFS-private File Server machine, on

AIX only:

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