partitioning

[Barry Smith]

    PETSc currently only provides an interface using graphs. Note
that since PETSc is just a library there is nothing stopping someone
from calingl ParMetis or any other library anyway they want in the same
code that uses PETSc.

    Barry

On Feb 21, 2009, at 9:30 AM, Yixun Liu wrote:

> Barry Smith wrote:
>>
>> On Feb 21, 2009, at 8:40 AM, Yixun Liu wrote:
>>
>>> Hi,
>>> ex2 give an example on how to partition using ParMETIS by inputing
>>> element graph and mesh. ParMETIS also provides function for  
>>> partitioning
>>> without inputing graph. Does PETSc provide some interface for this?
>>
>> I doubt it. How can one partition a graph without providing the  
>> graph?
>>
>> Barry
>>
>>>
>>>
>>> Thanks.
>>>
>>> Yixun
>>
> Mesh can produce graph by taking into account the fact two neighboring
> elements share same edge or surface, so we can let ParMETIS do it just
> providing mesh as input. ParMETIS provides a function named as
> ParMETIS_V3_PartMeshKway, which only takes a mesh as input.  
> Internally,
> this function use a mesh-to-graph routine(section 3.2 ParMETIS  
> manual).