Administration Reference

cacheinfo

Purpose

Defines configuration parameters for the Cache Manager

Description

The cacheinfo file defines configuration parameters for the Cache Manager, which reads the file as it initializes.

The file contains a single line of ASCII text and must reside in the /usr/vice/etc directory. Use a text editor to create it during initial configuration of the client machine; the required format is as follows:

   mount_dir:cache_dir:cache_size
    

where

mount_dir

Names the local disk directory at which the Cache Manager mounts the AFS namespace. It must exist before the afsd program runs. The conventional value is /afs. Using any other value prevents traversal of pathnames that begin with /afs (such as pathnames to files in foreign cells that do use the conventional name). The -mountdir argument to the afsd command overrides this value.

cache_dir

Names the local disk directory to use as a cache. It must exist before the afsd program runs. The standard value is /usr/vice/cache, but it is acceptable to substitute a directory on a partition with more available space. Although the Cache Manager ignores this field when configuring a memory cache, a value must always appear in it. The -cachedir argument to the afsd command overrides this value.

cache_size

Specifies the cache size as a number of 1-kilobyte blocks. Larger caches generally yield better performance, but a disk cache must not exceed 90% of the space available on the cache partition (85% for AIX systems), and a memory cache must use no more than 25% of available machine memory.

The -blocks argument to the afsd command overrides this value. To reset cache size without rebooting on a machine that uses disk caching, use the fs setcachesize command. To display the current size of a disk or memory cache between reboots, use the fs getcacheparms command.

Examples

The following example cacheinfo file mounts the AFS namespace at /afs, establishes a disk cache in the /usr/vice/cache directory, and defines cache size as 50,000 1-kilobyte blocks.

   /afs:/usr/vice/cache:50000
   

Related Information

afsd

fs getcacheparms

fs setcachesize