# MatPartitioningPTScotchSetStrategy
Sets the strategy to be used in PTScotch. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatPartitioningPTScotchSetStrategy(MatPartitioning part, MPPTScotchStrategyType strategy)
```
Collective


## Input Parameters

- ***part -*** the partitioning context
- ***strategy -*** the strategy, one of


```none
     MP_PTSCOTCH_DEFAULT     - Default behavior
     MP_PTSCOTCH_QUALITY     - Prioritize quality over speed
     MP_PTSCOTCH_SPEED       - Prioritize speed over quality
     MP_PTSCOTCH_BALANCE     - Enforce load balance
     MP_PTSCOTCH_SAFETY      - Avoid methods that may fail
     MP_PTSCOTCH_SCALABILITY - Favor scalability as much as possible
```



## Options Database Key

- ***-mat_partitioning_ptscotch_strategy [quality,speed,balance,safety,scalability] -*** strategy





## Note
The default is `MP_SCOTCH_QUALITY`. See the PTScotch documentation for more information.


## See Also
 `MATPARTITIONINGSCOTCH`, `MatPartitioningPTScotchSetImbalance()`, `MatPartitioningPTScotchGetStrategy()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/partition/impls/scotch/scotch.c.html#MatPartitioningPTScotchSetStrategy">src/mat/partition/impls/scotch/scotch.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/partition/impls/scotch/scotch.c.html#MatPartitioningPTScotchSetStrategy_PTScotch">MatPartitioningPTScotchSetStrategy_PTScotch in src/mat/partition/impls/scotch/scotch.c</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/mat/partition/impls/scotch/scotch.c)


[Index of all MatOrderings routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
