mpmetis man page

mpmetis — Partitions a mesh into a specified number of parts.


mpmetis [options] meshfile nparts


Required parameters
Stores the mesh to be partitioned.

The number of partitions to split the mesh.

Optional parameters


Specifies the graph to be used for computing the partitioning The possible values are:
- Partition the dual graph of the mesh [default]
- Partition the nodal graph of the mesh


Specifies the scheme to be used for computing the k-way partitioning. The possible values are:
- Recursive bisectioning
- Direct k-way partitioning [default]


Specifies the scheme to be used to match the vertices of the graph during the coarsening. The possible values are:
- Random matching
- Sorted heavy-edge 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 a bisection using a greedy strategy [default]
- 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:
- Minimize the edgecut [default]
- 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.


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.


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).


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.


Specifies the number of iterations for the refinement algorithms at each stage of the uncoarsening process. Default is 10.


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.


Specifies that no partitioning file should be generated.


Selects the seed of the random number generator.


Selects the dbglvl.


Prints this message.


mpmetis 5.1.0 February 2016