Shell or awk script to compute average of all the points within a circle Post: 302960925

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measurefs.reiser4

measurefs.reiser4(8)						reiser4progs manual					      measurefs.reiser4(8)

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 (maxi-
	      mal 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,  directo-
	      ries, 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>

reiser4progs							   28 Apr, 2003 					      measurefs.reiser4(8)