cacheadm - Online in the Cloud

PROGRAM:

NAME

cacheadm - administer and configure AtFS derived object cache

SYNOPSIS

cacheadm [-Amax_cached_per_cacheattr] [-Nmax_cached_per_name] [-Tmax_total_cached] [-q]
[-v] directories

DESCRIPTION

cacheadm provides control over the size of a derived object cache. You may set the maximum
total number (T) of derived files to be stored, the maximum number of derived files per
name (N) and the maximum number of derived files with the same name and the same caching
attribute (A). Called without any options, cacheadm returns the actual sizes of the
derived object caches in the named dirctories. An empty list of directories causes
cacheadm to operate on the current directory.

The relationship of the three cache size values must always be T >= N >= A. The caching
attribute mechanism is described on the af_cache(3) manual page. When calculating your
caching sizes you should keep in mind that you may set the total size (T) to any value but
your cache will never grow bigger than N*number_of_names. Number_of_names is the number
of source object histories in your directories, where derived objects may be compiled
from. If you set T to an astronomic value, the cache adapt it's size to the number of
source histories automatically.

In the current implementation, the caching sizes can only be increased. Reduction of the
maximum cache size is only possible when the cache is empty. Hence you have to clean your
cache (atfsrepair -C (1)) first if you want to shrink its size.

OPTIONS

-A max_cached_per_cacheattr
Set the maximum number of derived files with the same name and the same caching
attribute to be stored. Default is 1.

-N max_cached_per_name
Set the maximum number of derived files with the same name to be stored. Default
is 3.

-T max_total_cached
Set the total maximum number of derived files to be stored in the derived object
cache. Default is 64. -q Quiet operation. Suppresses any output to stdout. This
option does not affect error messages (stderr).

-v Output version identification string.

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