[petsc-users] How to read/write unstructured mesh in parallel

[Fande Kong]

It seems to be a good idea. I have another related question. If all
processors read the same file at the same time, would it be very slow for
conflicting access?

On Mon, Nov 19, 2012 at 4:52 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Tue, Nov 20, 2012 at 12:38 AM, Fande Kong <fd.kong at siat.ac.cn> wrote:
>
>> I want to try very 'large' mesh.  I guess it should be bottleneck.
>
>
> It's really worth profiling. Having every process read directly is no more
> scalable (frequently less, actually) than having rank 1 read incrementally
> and send to whoever should own it. You can do full parallel IO, but the
> code depends on the mesh format.
>



-- 
Fande Kong
ShenZhen Institutes of Advanced Technology
Chinese Academy of Sciences
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