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mccs - Online in the Cloud

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This is the command mccs that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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 containing 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 consists of first minimizing the number of
removed packaged, and then the number of packages that change installation status or
installed version.

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 recommendations of installed packages that are not satisfied, and finally the
number of newly installed packages.

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