ppmd(1) [debian man page]

ppmd(1) 							       utils								   ppmd(1)

NAME

       ppmd - file-to-file compressor

SYNTAX

       ppmd [e|d] [switches] filename...|wildcard...

DESCRIPTION

       It  is  written	for  embedding in user programs mainly and it is not intended for immediate use. I was interested in speed and performance
       improvements of abstract PPM model [1-6] only, without tuning it to particular data types,  therefore  compressor  works  good  enough  for
       texts, but it is not so good for nonhomogeneous files (executables) and for noisy analog data (sounds, pictures etc.). Program is very mem-
       ory consuming, you can choose balance between execution speed and memory economy, on one hand,  and  compression  performance,  on  another
       hand, with the help of model order selection option (-o).

OPTIONS

       -d     Delete file[s] after processing, default: disabled.

       -s     Silent mode.

       -fName Set output file name to Name.

       -mN    Use  N  MB memory - [1,256], default: 10. The PPMII algorithm might need a lot of memory, especially when used on large files and/or
	      used with large model order. If ppmd needs more memory than you give it, the compression will be worse. The exact effect	is  depen-
	      dent on the -r option.

       -oN    Set  model  order  to N - [2,16], default: 4. Bigger model orders almost surely results in better compression and surely more memory
	      and CPU usage.

       -r{0,1,2}
	      Methods of restoration of model correctness at memory insufficiency:
		  '-r0 - restart model from scratch'. This method is not optimal for any type of data sources, but it works fast and efficient	in
	      average, so it is the recommended method (default).
		  '-r1	-  cut	off model'. This method is optimal for quasistationary sources when the period of stationarity is much larger than
	      period between cutoffs.  As a rule, it gives better results, but it is slower than other methods and it is unstable against fragmen-
	      tation of memory heap at high model orders and low memory.
		  '-r2	- freeze model'. This method is optimal for stationary sources (show me such source when You will find it ;-)). It is fast
	      and efficient for such sources.

EXAMPLES

       To run this program the standard way type:

       ppmd e /tmp/myfile

       Alternatively you can run it as:

       ppmd -e -o 16 /tmp/myfile

AUTHORS

       PPMd was written by Dmitry Shkarin <dmitry.shkarin@mtu-net.ru> and Dmitry Subbotin.

SEE ALSO

       gzip(1), bzip2(1), lzma(1).

10.1								    2011-07-25								   ppmd(1)

RAS-MC-CTL(8)						RAS memory controller admin utility					     RAS-MC-CTL(8)

NAME

       ras-mc-ctl - RAS memory controller admin utility

SYNOPSIS

       ras-mc-ctl [OPTION]...

DESCRIPTION

       The  ras-mc-ctl	program  is  a perl(1) script which performs some useful RAS administration tasks on EDAC (Error Detection and Correction)
       drivers.

OPTIONS

       --help Display a brief usage message.

       --mainboard
	      Print mainboard vendor and model for this hardware, if available.  The method used by ras-mc-ctl to obtain the mainboard vendor  and
	      model information for the current system is described below in the MAINBOARD CONFIGURATION section.

       --status
	      Print the status of EDAC drivers (loaded or unloaded).

       --quiet
	      Be less verbose when executing an operation.

       --register-labels
	      Register	motherboard DIMM labels into EDAC driver sysfs files.  This option uses the detected mainboard manufacturer and model num-
	      ber in combination with a "labels database" found in any of the files under /etc/ras/dimm_labels.d/* or in  the  labels.db  file	at
	      /etc/ras/dimm_labels.db. An entry for the current hardware must exist in the labels database for this option to do anything.

       --print-labels
	      Display the configured labels for the current hardware, as well as the current labels registered with EDAC.

       --guess-labels
	      Print DMI labels, when bank locator is available at the DMI table.  It helps to fill the labels database at /etc/ras/dimm_labels.d/.

       --labeldb=DB
	      Specify an alternate location for the labels database.

       --delay=time
	      Specify a delay of ime seconds before registering dimm labels.  Only meaninful if used together with --register-labels.

       --layout
	      Prints  the  memory  layout as detected by the EDAC driver. Useful to check if the EDAC driver is properly detecting the memory con-
	      troller architecture.

MAINBOARD CONFIGURATION

       The ras-mc-ctl script uses the following method to determine the current system's mainboard vendor and model information:

       1.  If the config file /etc/edac/mainboard exists, then it is parsed by ras-mc-ctl. The mainboard config file has the following simple syn-
	   tax:

		  vendor = <mainboard vendor string>
		  model =  <mainboard model string>
		  script = <script to gather mainboard information>

	   Where  anything  after a '#' character on a line is considered a comment.  If the keyword script is specified, then that script or exe-
	   cutable is run by ras-mc-ctl to gather the mainboard vendor and model information. The script should write the resulting information on
	   stdout in the same format as the mainboard config file.

       2.  If no mainboard config file exists, then ras-mc-ctl will attempt to read DMI information from the sysfs files

		/sys/class/dmi/id/board_vendor
		/sys/class/dmi/id/board_name

       3.  If  the sysfs files above do not exist, then ras-mc-ctl will fall back to parsing output of the dmidecode(8) utility. Use of this util-
	   ity will most often require that ras-mc-ctl be run as root.

SEE ALSO

       fBrasdaemon(1)

																     RAS-MC-CTL(8)