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dgtst(1) PT-Scotch user's manual dgtst(1) NAME dgtst - test the consistency of source graphs in parallel SYNOPSIS dgtst [options] [gfile] [lfile] DESCRIPTION The dgtst program checks, in a parallel way, the consistency of a Scotch source graph and, in case of success, outputs some statistics regarding edge weights, vertex weights, and vertex degrees. It produces the very same results as the gtst(1) program of the Scotch sequential distribution, but unlike this latter it can handle distrib- uted graphs. Source graph file gfile is either a centralized graph file, or a set of files representing fragments of a distributed graph. The resulting sta- tistics are stored in file lfile. When file names are not specified, data is read from standard input and written to standard output. Stan- dard streams can also be explicitly represented by a dash '-'. When the proper libraries have been included at compile time, dgtst can directly handle compressed graphs, both as input and output. A stream is treated as compressed whenever its name is postfixed with a com- pressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The com- pression formats which can be supported are the bzip2 format ('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma', on input only). dgtst bases on implementations of the MPI interface to spread work across the processing elements. It is therefore not likely to be run directly, but instead through some launcher command such as mpirun. OPTIONS -h Display some help. -rpnum Set root process for centralized files (default is 0). -V Display program version and copyright. EXAMPLE Run dgtst on 5 processing elements to test the consistency of graph brol.grf $ mpirun -np 5 dgtst brol.grf Run dgord on 5 processing elements to test the consistency of a dis- tributed graph stored on graph fragment files brol5-0.dgr to brol5-4.dgr, and save the resulting ordering to file brol.ord (see dgscat(1) for an explanation of the '%p' and '%r' sequences in names of distributed graph fragments). $ mpirun -np 5 dgtst brol%p-%r.dgr brol.ord SEE ALSO dgscat(1), gtst(1), dgord(1). PT-Scotch user's manual. AUTHOR Francois Pellegrini <francois.pellegrini@labri.fr> August 03, 2010 dgtst(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLE | SEE ALSO | AUTHOR
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