Open System Services NFS Management and Operations Guide

7 Routine Management Tasks
This chapter describes routine management tasks required for OSS NFS servers.
Managing NFS Filesets
As more users and applications are added to your system, you can add new NFS filesets or change
some attributes of an existing fileset. These topics describe the issues to note when creating new
filesets:
• “Adding NFS Filesets”
• “Splitting a Fileset by Splitting an OSS NFS Server” (page 68)
Adding NFS Filesets
When adding a new fileset, you must know:
• Local mount point
If the local mount point is a slash (/), you are adding a root fileset.
If the local mount point is anything other than / (for example, /lab/chem), all directories
above it must already exist.
• Super ID access
If the server associated with this fileset sets Root-USER-OK to True, the client super ID has root
access to the fileset. Setting Root-USER-OK to True is a security decision you make based on
the clients that this fileset is exported to. In addition, if ROOT-USER-OK is FALSE, no OSS NFS
user ID can be mapped to the super ID.
This example adds a new fileset:
ADD SERVER VAR,&
STYPE OSS,&
PROCESS $VAR,&
CPU 0,&
PROGRAM $SYSTEM.ZOSSNFS.NFSSVRHP,&
MNTPOINT "/var",&
ROOT-USER-OK TRUE,&
PRI 190, &
BACKUPCPU 2
Considerations
• Unless availability and reliability considerations dictate otherwise, always configure a server
as a process pair using the BACKUPCPU parameter.
• The processor priority of the OSS NFS server should be a function of the local-system load
compared to the remote (OSS NFS) client load. If clients run I/O-intensive applications, they
can keep the local users from gaining access to system resources. As a result, the OSS NFS
server process should be given a priority lower than that of the local users. However, if the
local users are running processor-intensive applications with occasional I/O demand, the
OSS NFS server should be given a higher priority than these application processes.
In addition, an operator TACL process should always run at a higher priority than the OSS
NFS servers, so that the operator can intervene and troubleshoot the server.
Splitting a Fileset by Splitting an OSS NFS Server
You might need to change the attributes of a fileset to accommodate the new requirements of the
clients. Sometimes, however, simply changing attributes is not enough. You might need to split an
68 Routine Management Tasks