1MPMETIS(1)                       User Commands                      MPMETIS(1)
2
3
4

NAME

6       mpmetis - Partitions a mesh into a specified number of parts.
7

SYNOPSIS

9       mpmetis [options] meshfile nparts
10

DESCRIPTION

12              Required parameters
13
14       meshfile
15              Stores the mesh to be partitioned.
16
17       nparts The number of partitions to split the mesh.
18
19              Optional parameters
20
21       -gtype=string
22
23              Specifies  the  graph  to be used for computing the partitioning
24              The possible values are:
25
26       dual   - Partition the dual graph of the mesh [default]
27
28       nodal  - Partition the nodal graph of the mesh
29
30       -ptype=string
31
32              Specifies the scheme to be used for computing the  k-way  parti‐
33              tioning.  The possible values are:
34
35       rb     - Recursive bisectioning
36
37       kway   - Direct k-way partitioning [default]
38
39       -ctype=string
40
41              Specifies  the  scheme  to  be used to match the vertices of the
42              graph during the coarsening.  The possible values are:
43
44       rm     - Random matching
45
46       shem   - Sorted heavy-edge matching [default]
47
48       -iptype=string [applies only when -ptype=rb]
49
50              Specifies the scheme to be used to compute  the  initial  parti‐
51              tioning of the graph.  The possible values are:
52
53       grow   - Grow a bisection using a greedy strategy [default]
54
55       random - Compute a bisection at random
56
57       -objtype=string [applies only when -ptype=kway]
58
59              Specifies  the  objective  that  the  partitioning routines will
60              optimize.  The possible values are:
61
62       cut    - Minimize the edgecut [default]
63
64       vol    - Minimize the total communication volume
65
66       -contig [applies only when -ptype=kway]
67
68              Specifies that the partitioning routines should try  to  produce
69              partitions  that are contiguous. Note that if the input graph is
70              not connected this option is ignored.
71
72       -minconn [applies only when -ptype=kway]
73
74              Specifies that the partitioning routines should try to  minimize
75              the  maximum  degree  of the subdomain graph, i.e., the graph in
76              which each partition is a node,  and  edges  connect  subdomains
77              with a shared interface.
78
79       -tpwgts=filename
80
81              Specifies  the  name  of the file that stores the target weights
82              for each partition. By default, all partitions are assumed to be
83              of the same size.
84
85       -ufactor=int
86
87              Specifies  the  maximum  allowed load imbalance among the parti‐
88              tions.  A value of x indicates that the allowed  load  imbalance
89              is  1+x/1000.   For  ptype=rb, the load imbalance is measured as
90              the ratio of the 2*max(left,right)/(left+right), where left  and
91              right  are the sizes of the respective partitions at each bisec‐
92              tion.  For ptype=kway, the load imbalance  is  measured  as  the
93              ratio  of  max_i(pwgts[i])/avgpwgt, where pwgts[i] is the weight
94              of the ith partition and avgpwgt is the sum of the total  vertex
95              weights  divided  by  the  number  of partitions requested.  For
96              ptype=rb, the default  value  is  1  (i.e.,  load  imbalance  of
97              1.001).   For  ptype=kway,  the  default value is 30 (i.e., load
98              imbalance of 1.03).
99
100       -ncommon=int
101
102              Specifies the common number of nodes that two elements must have
103              in  order to put an edge between them in the dual graph. Default
104              is 1.
105
106       -niter=int
107
108              Specifies the number of iterations for the refinement algorithms
109              at each stage of the uncoarsening process. Default is 10.
110
111       -ncuts=int
112
113              Specifies  the  number  of  different partitionings that it will
114              compute.  The final partitioning is the one  that  achieves  the
115              best edgecut or communication volume. Default is 1.
116
117       -nooutput
118
119              Specifies that no partitioning file should be generated.
120
121       -seed=int
122
123              Selects the seed of the random number generator.
124
125       -dbglvl=int
126
127              Selects the dbglvl.
128
129       -help
130
131              Prints this message.
132
133
134
135mpmetis 5.1.0                    February 2019                      MPMETIS(1)