OSF DCE Administration Guide--Introduction

Client and Server Considerations
epidaemon
For the System Control machine, the following program is added:
upserver
For the File Server machine, the following programs are added:
newaggr, upclient
For the Fileset Location Database machine, the following programs are added:
flserver, newaggr, upclient
The following programs are optional for DFS servers:
bak , bakserver, butc, cm, fms, repserver, scout, upclient, upserver
DFS File Servers can assume different roles. The DFS space requirements may vary,
depending on the role of a particular machine. (See the for further information about
DFS configuration options.) DFS machines that export data for use in the global
namespace can run the following server processes:
• The flserver process maintains a complete list of fileset locations in the FLDB. The
FLDB is a cell-wide database that maps filesets to the servers on which they are
located. There must be at least one flserver process running in a cell.
• The fxd daemon is a user-space process. The fxd daemon starts the kernel processes
that implement the File Exporter.
• The ftserver process allows system administrators to create, delete, duplicate, move,
back up, or restore entire filesets with one set of commands.
• The bosserver process reduces system administration demands by constantly
monitoring the processes running on its File Server machine. The bosserver process
can restart failed processes automatically; it provides a convenient interface for
administrative tasks.
• The repserver process manages replicas of filesets on all File Server machines.
• The upserver process controls the distribution of common configuration files to all
other DFS server machines in a domain.
• The upclient process contacts the upserver process to verify that the most recent
version of each DFS configuration file is being used.
• The dfsbind process is described in Section 3.1.7.
The following text describes the DFS configurations: a System Control machine, a
FLDB machine, a File Server machine, a Binary Distribution machine, and a DFS client
that is also a private file server machine.
A system control machine distributes system configuration information, such as
administrative lists, which is shared by all DFS server machines in an administrative
domain. This machine runs the upserver process and the bosserver process.
A FLDB machine runs the flserver process. The FLDB machine tracks the locations of
all filesets and records the locations of filesets in the FLDB. The flserver process can run
on the same machine as the File Server machine.
124244 Tandem Computers Incorporated 3− 11