Information Technology Reference
In-Depth Information
total for cache
initial size: 53888k
end size: 72k
high water size: 72k
#
The
end size
(cache working set size when logging was halted) and
high water
size
(largest cache working set size) are displayed for each file system mounted
in the cache. In this example, only one file system (
/home
) is mounted.
The
total for cache
summary includes the initial size of the cache. If the
high water size is the same as the initial size, the cache is probably too small.
If the high water size is much smaller than the initial size, the cache is prob-
ably too large.
Summary
The
Network File System
(
NFS
) service uses the client/server model to allow
computers of different architectures running different operating systems to
remotely access the storage of other systems. The NFS service also allows
multiple systems to access the same information, thus eliminating redundan-
cy, improving consistency, and reducing administration.
An NFS client accesses this information in a somewhat transparent mode.
That is, the remote resource appears and can be treated as local storage space
for most operations and applications.
The Auto File System (AutoFS) service is a client-side service that is used to
automatically mount and unmount NFS resources on demand. This simpli-
fies keeping track of resources manually and can reduce network traffic. The
NFS resources managed by AutoFS are listed in configuration files called
maps,
which identify the resources and where they should be mounted.
The Cache File System (CacheFS) is another client-side service that pro-
vides the ability to cache a remotely accessed NFS resource locally on the
NFS client. This not only speeds up client access to the data but also decreas-
es network traffic and the load on the NFS server.
