Man Linux: Main Page and Category List

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.

SEE ALSO

       chgrp(1), chmod(1), atfsrepair(1), af_cache(3)

AUTHOR

       Andreas.Lampen@cs.tu-berlin.de