[petsc-users] Petsc Binary Write - Memory

[venkatesh g]

The size of the matrix is 84500 x 84500

the no. of non-zero elements is 2.7338e+09

cheers,
Venkatesh

On Wed, Jun 10, 2015 at 6:35 PM, Satish Balay <balay at mcs.anl.gov> wrote:

> Whats the size of the matrix? How many non-zeros?
>
> Satish
>
> On Wed, 10 Jun 2015, venkatesh g wrote:
>
> > Hi
> >
> > I am trying to write very large sparse matrices A and B for solving
> > generalized Eigenvalue problem
> >
> > so that I can use SLEPC ex7.c code.
> >
> > I want to read matrices from file according to that code. And I generate
> > these matrices from Matlab using PetscBinaryWrite.m
> >
> > However, it exceeds my 256 GB RAM in one of the machines. So I am unable
> to
> > generate these binary matrices.
> >
> > Kindly let me know how to write them efficiently.
> >
> > cheers,
> >
> > Venkatesh
> >
>
>
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