[petsc-users] ILU in parallel

[Alexander Grayver]

Jed, Matt,

Ok, I see. Perhaps it was bad idea to play around with ILU for my 
problems...

Regards,
Alexander

On 09.12.2011 17:16, Matthew Knepley wrote:
> On Fri, Dec 9, 2011 at 10:06 AM, Alexander Grayver 
> <agrayver at gfz-potsdam.de <mailto:agrayver at gfz-potsdam.de>> wrote:
>
>     On 09.12.2011 16:58, Matthew Knepley wrote:
>>     On Fri, Dec 9, 2011 at 9:44 AM, Alexander Grayver
>>     <agrayver at gfz-potsdam.de <mailto:agrayver at gfz-potsdam.de>> wrote:
>>
>>         Hello,
>>
>>         Sorry for dummy question, but what are options for parallel
>>         ILU in petsc? Which packages are best for big sparse matrices
>>         (>= 10^6)?
>>         Where do I start from?
>>
>>
>>     http://www.mcs.anl.gov/petsc/petsc-dev/docs/linearsolvertable.html
>>
>>     I generally recommend against parallel ILU, but Hypre has it.
>     Why?
>
>
> Its fundamentally not scalable, has unpredictable performance, and in 
> my experience worse than sparse direct.
>
>    Matt
>
>>        Matt
>>
>>         Regards,
>>         Alexander
>>
>>
>>
>>
>>     -- 
>>     What most experimenters take for granted before they begin their
>>     experiments is infinitely more interesting than any results to
>>     which their experiments lead.
>>     -- Norbert Wiener
>
>
>
>
> -- 
> What most experimenters take for granted before they begin their 
> experiments is infinitely more interesting than any results to which 
> their experiments lead.
> -- Norbert Wiener

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