petsc-3.12.4 2020-02-04
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# PCRedundantSetNumber

Sets the number of redundant preconditioner contexts.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode PCRedundantSetNumber(PC pc,PetscInt nredundant)

Logically Collective on PC

### Input Parameters

| pc | - the preconditioner context
| nredundant | - number of redundant preconditioner contexts; for example if you are using 64 MPI processes and use an nredundant of 4 there will be 4 parallel solves each on 16 = 64/4 processes.

### Level

advanced

### Location

src/ksp/pc/impls/redundant/redundant.c

### Implementations

PCRedundantSetNumber_Redundant in src/ksp/pc/impls/redundant/redundant.c
Index of all PC routines
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Index of all manual pages