[Paraview] Which readers are parallel and which are not?

[Cook, Rich]

Isee, thank you!
-- Rich 

On Feb 15, 2012, at 11:17 AM, David E DeMarle wrote:

> Other than look in the source code and see how each reader handles
> UPDATE_EXTENT/UPDATE_PIECE_NUMBER* no.
> 
> The default behavior for a reader which doesn't understand parallelism
> is to have every node read the whole file and let the pipeline clip
> out and deallocate everything owned by the other nodes just after the
> reader.
> 
> Readers that do understand parallelism vary in what specific strategy
> they use to support it. Most have each node read a different file or
> stripe of the same file and get just the local portion of the data. I
> gather that some of the newer readers read larger portions on some
> nodes and transmit over MPI the subportions that other nodes are
> responsible (like the vtkTransmitX filters) for.
> 
> This question has been asked twice recently so I'll see about
> compiling a list and putting a description of the parallel strategy
> that each reader uses into the XML and thus book and help. In the mean
> time ask the list about any particular reader and someone will most
> likely answer what that reader does.
> 
> *see http://paraview.org/Wiki/Writing_ParaView_Readers
> 
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
> 
> 
> 
> On Wed, Feb 15, 2012 at 12:31 PM, Cook, Rich <cook47 at llnl.gov> wrote:
>> Is there a way to determine if a reader works in parallel?  I'm having a reader crash when run in parallel, and I'm not sure which are supposed to handle parallelism and which aren't, and if not, then is it supposed to crash or give an error or...?
>> Thanks.
>> --
>> ✐Richard Cook
>> ✇ Lawrence Livermore National Laboratory
>> Bldg-453 Rm-4024, Mail Stop L-557
>> 7000 East Avenue,  Livermore, CA, 94550, USA
>> ☎ (office) (925) 423-9605
>> ☎ (fax) (925) 423-6961
>> ---
>> Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept.
>> (opinions expressed herein are mine and not those of LLNL)
>> 
>> 
>> 
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-- 
✐Richard Cook   
✇ Lawrence Livermore National Laboratory
Bldg-453 Rm-4024, Mail Stop L-557        
7000 East Avenue,  Livermore, CA, 94550, USA
☎ (office) (925) 423-9605    
☎ (fax) (925) 423-6961
---
Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept.
(opinions expressed herein are mine and not those of LLNL)