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)