NFS Services Administrator's Guide (B.11.31.04) March 2009

NOTE: CacheFS cannot be used with NFSv4.
CacheFS Terms
The following CacheFS terms are used in this chapter:
back filesystem A filesystem that is cached is called a back filesystem. HP-UX
currently supports only NFS as the back filesystem.
front filesystem A local filesystem that is used to store the cached data is
called a front filesystem. HFS and VxFS are the only
supported front filesystem types.
cold cache A cache that has not yet been populated with data from the
back filesystem is called cold cache.
cache miss An attempt to reference data that is not yet cached is called
a cache miss.
warm cache A cache that contains data in its front filesystem is called a
warm cache. In this case, the cached data can be returned to
the user without requiring an action from the back filesystem.
cache hit A successful attempt to reference data that is cached is called
a cache hit.
How CacheFS Works
Figure 4-1 displays a sample CacheFS environment.
108 Configuring and Administering a Cache Filesystem