mpmetis man page
mpmetis ā Partitions a mesh into a specified number of parts.
Synopsis
mpmetis [options] meshfile nparts
Description
Required parameters
 meshfile
Stores the mesh to be partitioned.
 nparts

The number of partitions to split the mesh.
Optional parameters
gtype=string
Specifies the graph to be used for computing the partitioning The possible values are:
 dual
 Partition the dual graph of the mesh [default]
 nodal
 Partition the nodal graph of the mesh
ptype=string
Specifies the scheme to be used for computing the kway partitioning. The possible values are:
 rb
 Recursive bisectioning
 kway
 Direct kway partitioning [default]
ctype=string
Specifies the scheme to be used to match the vertices of the graph during the coarsening. The possible values are:
 rm
 Random matching
 shem
 Sorted heavyedge matching [default]
iptype=string [applies only when ptype=rb]
Specifies the scheme to be used to compute the initial partitioning of the graph. The possible values are:
 grow
 Grow a bisection using a greedy strategy [default]
 random
 Compute a bisection at random
objtype=string [applies only when ptype=kway]
Specifies the objective that the partitioning routines will optimize. The possible values are:
 cut
 Minimize the edgecut [default]
 vol
 Minimize the total communication volume
 contig [applies only when ptype=kway]
Specifies that the partitioning routines should try to produce partitions that are contiguous. Note that if the input graph is not connected this option is ignored.
 minconn [applies only when ptype=kway]
Specifies that the partitioning routines should try to minimize the maximum degree of the subdomain graph, i.e., the graph in which each partition is a node, and edges connect subdomains with a shared interface.
 tpwgts=filename
Specifies the name of the file that stores the target weights for each partition. By default, all partitions are assumed to be of the same size.
 ufactor=int
Specifies the maximum allowed load imbalance among the partitions. A value of x indicates that the allowed load imbalance is 1+x/1000. For ptype=rb, the load imbalance is measured as the ratio of the 2*max(left,right)/(left+right), where left and right are the sizes of the respective partitions at each bisection. For ptype=kway, the load imbalance is measured as the ratio of max_i(pwgts[i])/avgpwgt, where pwgts[i] is the weight of the ith partition and avgpwgt is the sum of the total vertex weights divided by the number of partitions requested. For ptype=rb, the default value is 1 (i.e., load imbalance of 1.001). For ptype=kway, the default value is 30 (i.e., load imbalance of 1.03).
 ncommon=int
Specifies the common number of nodes that two elements must have in order to put an edge between them in the dual graph. Default is 1.
 niter=int
Specifies the number of iterations for the refinement algorithms at each stage of the uncoarsening process. Default is 10.
 ncuts=int
Specifies the number of different partitionings that it will compute. The final partitioning is the one that achieves the best edgecut or communication volume. Default is 1.
 nooutput
Specifies that no partitioning file should be generated.
 seed=int
Selects the seed of the random number generator.
 dbglvl=int
Selects the dbglvl.
 help
Prints this message.