:orphan:
# PetscSFDuplicate
duplicate a `PetscSF`, optionally preserving rank connectivity and graph
## Synopsis
```
#include "petscsf.h"
PetscErrorCode PetscSFDuplicate(PetscSF sf, PetscSFDuplicateOption opt, PetscSF *newsf)
```
Collective
## Input Parameters
- ***sf -*** communication object to duplicate
- ***opt -*** `PETSCSF_DUPLICATE_CONFONLY`, `PETSCSF_DUPLICATE_RANKS`, or `PETSCSF_DUPLICATE_GRAPH` (see `PetscSFDuplicateOption`)
## Output Parameter
- ***newsf -*** new communication object
## See Also
`PetscSF`, `PetscSFType`, `PetscSFCreate()`, `PetscSFSetType()`, `PetscSFSetGraph()`
## Level
beginner
## Location
src/vec/is/sf/interface/sf.c
## Implementations
PetscSFDuplicate_Window in src/vec/is/sf/impls/window/sfwindow.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/sf/interface/sf.c)
[Index of all PetscSF routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)