Re: Octave Out-of-Core Solution?

[David Bateman]

Neal Martin wrote:
> Can someone explain how Octave handles the situation in which a user
> runs a large job that
> exceeds the memory capacity of the system (for example, 1M X 1M FFT)?
> In particular, if 
> the system is configured with a large swap space, is it used?  Is the
> implementation of 
> the FFT done as an out-of-core solution?  If so, does it fail under
> certain system 
> configuration conditions and what are these conditions?
>   
Octave relies on third-party libraries to do the heavy lifting and if 
these support out-of-core solution then Octave will. I had my own lapack 
dgetrf and dgetrs out-of-core functions a few years back when my problem 
would fit in the memory of my machine and I could probably dig them up 
and send them to you, if you can't find other lapack out-of-core 
implementation, and these might be used for an LU solver with Octave I 
suppose. However for FFTs Octave uses FFTW and I don't believe that FFTW 
has any out-of-core support

D.


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