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LEARN ABOUT DEBIAN

mccs

mccs(1) 						       Debian User's Manual							   mccs(1)

NAME

       mccs - package dependency solver

SYNOPSIS

       mccs [options]

DESCRIPTION

       mccs  (which  stands  for Multi Criteria CUDF Solver) is a solver for package dependency problems expressed in the CUDF format. By default,
       mccs reads a problem specification from standard input, and writes the solution to standard output.

OPTIONS FOR CONTROLLING INPUT
/OUTPUT
       -i file
	      Read input from file file instead of standard input.

       -o file
	      Write the solution to file instead of standard output.

       -fo    full solution output

       -v n   set verbosity level to n.

       -h     print this help

OPTIONS FOR SELECTING THE SOLVER ENGINE

       By default, mccs uses the cbc solving engine.

       -lpsolve
	      use lpsolve solver

       -lp lpsolver
	      specify a solving engine that takes the cplex input format. lpsolver is the path of a script that takes as input the file name  con-
	      taining	the   cplex   input,   and   that   produces   the  solution  on  standard  output  (an  example  for  scip  is  given	in
	      /usr/share/doc/mccs/engines/sciplp).

       -pblib pbsolver
	      use pseudo-Boolean solver pbsolver as solving engine.

       -nosolve
	      do not solve the problem (for debugging)

OPTIONS FOR CONTROLLING CONSTRAINT GENERATION

       -noreduce
	      do not reduce the initial problem

       -only-agregate-constraints
	      generate only agregate constraints

       -only-desagregate-constraints
	      generate only deagregate constraints (default)

       -all-constraints
	      generate all kind of constraints (ensure redundancy)

OPTIONS FOR CONTROLLING OPTIMIZATION

       See the file /usr/share/doc/mccs/README.optimization-criteria for a full grammar of optimization criteria.

EXAMPLES

       An example input file can be found at /usr/share/doc/mccs/examples/legacy.cudf.

	   mccs -i legacy.cudf

       calls mccs on examples/legacy.cudf and prints the solution on stdout. With such a call mccs will resort to the  default	underlying  solver
       cbc and use a default criterion to solve the problem.

	   mccs -i legacy.cudf -o sol -lexagregate[-removed,-changed]
	   -lpsolve

       Here,  mccs  puts the solution into the	file "sol" and solves the problem using the lpsolve solver with the paranoid criterion, which con-
       sists of first minimizing the number of removed packaged, and then the number of packages that change installation status or installed ver-
       sion.

	   mccs -i legacy.cudf -o sol 
	   -lexsemiagregate[-removed,-notuptodate,
	   -nunsat[recommends:,true],-new]

       The  criterion  used  here is the trendy criterion, which consists of first minimizing the number of package removals, then to minimize the
       number of installed packages that are installed in a version older the most recent available version, then to minimize the number of recom-
       mendations of installed packages that are not satisfied, and finally the number of newly installed packages.

AUTHOR

       mccs has been written by Claude Michel <cpjm@polytech.unice.fr>. The development of mccs has been partly supported by the European research
       project Mancoosi.

								    9 May 2011								   mccs(1)