[petsc-users] Questions about PETSc

[Aron Ahmadia]

if the file is stored in the PETSc format, you can use PETSc to pull the
file in using MPIIO, which should be (hopefully) faster.

http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/Viewer/PetscViewerBinarySetMPIIO.html

Feel free to pop these questions to petsc-users (cc'd), there are more of
them and they usually know more than me :)

-Aron

On Sat, Jan 8, 2011 at 2:21 PM, Zuhair Khayyat
<zuhair.khayyat at kaust.edu.sa>wrote:

> Dear Aron,
>
> Currently I am using PETSc for my research to implement a graph mining
> algorithm on a large cluster, and I would like ask you some questions due to
> your experience with this tool.
>
> Have you ever tried to optimize allocating a very large matrix from input
> file in parallel? I have a very large file (around 10 GB) and it takes too
> long to allocate the matrix through the main node. I am planning to
> implement a distributed parallel file reader that split the original file
> and make each node reads it separately into a common matrix.
>
> Is there and other tools that are comparable to PETSc in which they have
> parallel file reader?
>
> Thank you for your help
>
> Regards,
> Zuhair Khayyat
>
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