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.\" Text automatically generated by txt2man
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.TH ptscotch_dgtst 1 "June 05, 2008" "" "PT-Scotch user's manual"
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\fBptscotch_dgtst \fP- test the consistency of Scotch source graphs in parallel
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\fBptscotch_dgtst\fP [\fIoptions\fP] [\fIgfile\fP] [\fIlfile\fP]
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The \fBptscotch_dgtst\fP program checks, in a parallel way, the consistency of a
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source graph, and outputs some statistics regarding edge weights,
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vertex weights, and vertex degrees in case of success.
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It produces the very same results as the \fBgtst\fP(1) program of the
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Scotch sequential distribution, but unlike this latter it can handle
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Source graph file \fIgfile\fP is either a centralized graph file, or a set
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of files representing fragments of a distributed graph. The
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resulting statistics are stored in file \fIlfile\fP. When file names are
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not specified, data is read from standard input and written to
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standard output. Standard streams can also be explicitly
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represented by a dash '-'.
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When the proper libraries have been included at compile time, \fBptscotch_dgtst\fP
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can directly handle compressed graphs, both as input and output. A
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stream is treated as compressed whenever its name is postfixed with
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a compressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The
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compression formats which can be supported are the bzip2 format
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('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma', on
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\fBptscotch_dgtst\fP bases on implementations of the MPI interface to spread work
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across the processing elements. It is therefore not likely to be run
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directly, but instead through some launcher command such as \fBmpirun\fP.
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Set root process for centralized files (default is 0).
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Display program version and copyright.
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Run \fBptscotch_dgtst\fP on 5 processing elements to test the consistency of graph brol.grf
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$ mpirun -np 5 ptscotch_dgtst brol.grf
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Run dgord on 5 processing elements to test the consistency of a
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distributed graph stored on graph fragment files brol5-0.grf to
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brol5-4.grf, and save the resulting ordering to file brol.ord (see
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\fBdgscat\fP(1) for an explanation of the '%p' and '%r' sequences in names
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of distributed graph fragments).
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$ mpirun -np 5 ptscotch_dgtst brol%p-%r.grf brol.ord
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\fBptscotch_dgscat\fP(1), \fBptscotch_gtst\fP(1), \fBptscotch_dgord\fP(1).
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PT-Scotch user's manual.
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Francois Pellegrini <francois.pellegrini@labri.fr>
added
removed
debian/ptscotch_dgtst.1
