NAME

       measurefs.reiser4   -   the   program   for   measuring   reiser4   filesystem  parameters
       (fragmentation, node packing, etc.).

SYNOPSIS

       measurefs.reiser4 [ options ] FILE

DESCRIPTION

       measurefs.reiser4  is  reiser4  filesystem  measure  program.  You  can  estimate  reiser4
       filesystem fragmentation, packingm etc. structures by using it.

COMMON OPTIONS

       -V, --version
              prints program version.

       -?, -h, --help
              prints program help.

       -y, --yes
              assumes an answer 'yes' to all questions.

       -f, --force
              forces measurefs to use whole disk, not block device or mounted partition.

       -c, --cache N
              sets  tree  cache  node  number to passed value. This affects very much behavior of
              libreiser4. It affects speed, tree allocation, etc.

MEASUREMENT OPTIONS

       -S, --tree-stat
              shows different tree statistics (node packing, internal nodes, leaves, etc)

       -T, --tree-frag
              measures total tree fragmentation. The result is fragmentation factor - value  from
              0.00000  (minimal  fragmentation)  to  1.00000  (maximal  one). Most probably, this
              factor may affect sequential read performance.

       -D, --data-frag
              measures average files fragmentation. This means, that fragmentation of  each  file
              in  filesystem will be measured separately and results will be averaged. The result
              is fragmentation factor - value from 0.00000  (minimal  fragmentation)  to  1.00000
              (maximal one).

              Note, that for the fresh filesystem (created not very long time ago) and even fully
              filled by data, this value will be pretty small.

       -F, --file-frag FILE
              measures fragmentation of the specified file. The result is fragmentation factor  -
              value  from  0.00000  (minimal  fragmentation) to 1.00000 (maximal one). Note, that
              fragmentation of a small file (depends of used tail policy), which consists of tail
              items,  is  not  very  reliable value. That is because, they is always afoot due to
              balancing.

              Examples:

              measurefs.reiser4 -F /usr/bin /dev/hda2
              measurefs.reiser4 -F /bin/bash /dev/hda2

       -E, --show-file
              show file fragmentation for each file if --data-frag is specified.

PLUGIN OPTIONS

       -p, --print-profile
              prints the plugin profile. This is the set of default plugins used for all parts of
              a  filesystem  --  format, nodes, files, directories, hashes, etc. If --override is
              specified, then prints modified plugins.

       -l, --print-plugins
              prints all plugins libreiser4 know about.

       -o, --override TYPE=PLUGIN, ...
              overrides the default plugin of the type "TYPE"  by  the  plugin  "PLUGIN"  in  the
              plugin profile.

              Examples:

              measurefs.reiser4 -o nodeptr=nodeptr41,hash=rupasov_hash /dev/hda2

REPORTING BUGS

       Report bugs to <reiserfs-devel@vger.kernel.org>

SEE ALSO

       debugfs.reiser4(8), mkfs.reiser4(8), fsck.reiser4(8)

AUTHOR

       This manual page was written by Yury Umanets <umka@namesys.com>