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mord(1)                      Scotch user's manual                      mord(1)

NAME
       mord - compute sparse matrix orderings of meshes

SYNOPSIS
       mord [options] [mfile] [ofile] [lfile]

DESCRIPTION
       The mord program computes, in a sequential way, an ordering of a Scotch
       source mesh representing the pattern of some symmetric sparse matrix.
       Only nodes of the mesh are effectively ordered. Elements provide
       connectivity information, such that every node is considered to be
       linked to all of the nodes which share at least an element with it.

       Source mesh file mfile can only be a centralized mesh file. The
       resulting ordering is stored in file ofile. Eventual logging
       information (such as the one produced by option -v) is sent to file
       lfile. When file names are not specified, data is read from standard
       input and written to standard output. Standard streams can also be
       explicitely represented by a dash '-'.

       When the proper libraries have been included at compile time, gord can
       directly handle compressed meshes, both as input and output. A stream
       is treated as compressed whenever its name is postfixed with a
       compressed file extension, such as in 'brol.msh.bz2' or '-.gz'. The
       compression formats which can be supported are the bzip2 format
       ('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma', on
       input only).

OPTIONS
       -c?opt Choose default ordering strategy according to one or several
              options among:

              b      enforce load balance as much as possible.

              q      privilege quality over speed (default).

              s      privilege speed over quality.

              t      enforce safety.

       -h     Display some help.

       -m?mfile
              Save column block mapping data to file mfile. Mapping data
              specifies, for each node vertex, the index of the column block
              to which this node vertex belongs.

       -o?strat
              Use sequential mesh ordering strategy strat (see Scotch user's
              manual for more information).

       -t?tfile
              Save partitioning tree data to file tfile. Partitioning tree
              data specifies, for each node vertex, the index of the first
              node vertex of the parent block of the block to which the node
              vertex belongs. Altogether with the mapping data provided in
              file mfile, it allows one to rebuild the separator tree of the
              nested dissection process.

       -V     Display program version and copyright.

       -v?verb
              Set verbose mode to verb. It is a set of one of more characters
              which can be:

              s      strategy information.

              t      timing information.

EXAMPLE
       Reorder matrix mesh brol.msh and save the resulting ordering to file
       brol.ord using the default sequential mesh ordering strategy:

           $ mord brol.msh brol.ord

SEE ALSO
       gmk_msh(1), gotst(1), mtst(1).

       Scotch user's manual.

AUTHOR
       Francois Pellegrini <francois.pellegrini@labri.fr>

                               February 14, 2011                       mord(1)