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').

OPTIONS

       -copt  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.

       -mmfile
              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.

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

       -ttfile
              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.

       -vverb 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>

                                         23 November 2019                                 mord(1)