NFS Services Administrator's Guide

Configuring the Cache File System (CacheFS)
CacheFS Terms
Chapter 3 139
CacheFS Terms
Following are some CacheFS terms that will be used in this chapter:
back file system The file system that is being cached. On HP-UX, NFS is
the supported back file system.
front file system The file system that contains the cached data. HFS is
the supported front file systems.
cold cache A cache that does not yet have any data in its front file
system. In this case, requested data must be copied
from the back file system to the front file system (that
is, the cache must be populated). An attempt to
reference data that is not yet cached is called a “cache
miss.”
warm cache A cache that contains the desired data in its front file
system. In this case, the cached data can be returned to
the user without requiring any action from the back file
system. An attempt to reference data that has been
cached is called a “cache hit.”