Nested dissection by METIS/ParMETISThese methods produce orderings that reduce fill in sparse matrix factorizations (Cholesky). Ordering is accessed through calls to Zoltan_Order.
Nested dissection by Scotch/PT-Scotch
Parameters: | |
ORDER_METHOD | The order algorithm used by Zoltan is specified by this parameter.
Valid values are
"NODEND" (for nodal nested dissection by ParMETIS or METIS), |
ORDER_TYPE | "SERIAL" or "DIST". If SERIAL is selected, the serial version of the ordering routine is used, i.e. Metis for ParMetis or Scotch for PT-Scotch. SERIAL can be selected only on non distributed graph. |
ORDER_START_INDEX | The start index for the permutation vectors rank and iperm. Valid values are 0 and 1. |
Default Values: | |
ORDER_METHOD = NODEND | |
ORDER_TYPE = DIST | |
ORDER_START_INDEX = 0 | |
REORDER = FALSE |