03-09-2005
first off ... make sure it is NIS+ and not NIS ...
that said ...
i actually have been able to push NIS+ and NFS across different subnets (i.e., NIS+ server in Boston with NIS+ clients in Toronto) without any slaves or replicas so really the only thing that would stop you from setting both NFS and NIS+ servers in the Engineering subnet is a configuration issue ...
if both subnets go through the same router/switch devices --- there is no need for a NIS+ replica in the sales subnet unless you are measuring a miniscule performance hit that is really bothering the sales folks ... otherwise it is recommended that there also be a NIS+ replica on the remote subnet to enhance performance ... especially true if there is a sizable user base that read/write a lot of files on the hosts ... however my experience says that the remote NIS+ replica is really optional unless there is a "noticeable" performance difference between both subnets ....
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LEARN ABOUT MINIX
umount.nfs
UMOUNT.NFS(8) System Manager's Manual UMOUNT.NFS(8)
NAME
umount.nfs, umount.nfs4 - unmount a Network File System
SYNOPSIS
umount.nfs dir [-fvnrlh ]
DESCRIPTION
umount.nfs and umount.nfs4 are a part of nfs(5) utilities package, which provides NFS client functionality.
umount.nfs4 and umount.nfs are meant to be used by the umount(8) command for unmounting NFS shares. This subcommand, however, can also be
used as a standalone command with limited functionality.
dir is the directory on which the file system is mounted.
OPTIONS
-f Force unmount the file system in case of unreachable NFS system.
-v Be verbose.
-n Do not update /etc/mtab. By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip delet-
ing an entry.
-r In case unmounting fails, try to mount read-only.
-l Lazy unmount. Detach the file system from the file system hierarchy now, and cleanup all references to the file system as soon as it
is not busy anymore.
-h Print help message.
NOTE
For further information please refer nfs(5) and umount(8) manual pages.
FILES
/etc/fstab file system table
/etc/mtab table of mounted file systems
SEE ALSO
nfs(5), umount(8),
AUTHOR
Amit Gud <agud@redhat.com>
6 Jun 2006 UMOUNT.NFS(8)