[Pw_forum] error # 1 no scalar fft driver specified

[Rajesh]

Ok. Thank you Prof Paulatto.

On Sun, Oct 15, 2017 at 5:33 PM, Lorenzo Paulatto <paulatz at gmail.com> wrote:

> Quantum-espresso has been using MPI long before openmp,  as a result the
> MPI parallelism is more developped and more stable. I think you can stick
> to just MPI with good result, even on a single workstation.
>
> hth
>
>
> On 15/10/17 08:11, Rajesh wrote:
>
> Dear Prof Paulatto ,
>
> Than you for your response. I need to use qe for openmpi as well openmp
> but on separate workstations. I think openmp works better on multi-cpu pc
> and openmpi on multi node clusters. I am right?
>
> Thank you.
>
> On Sun, Oct 15, 2017 at 12:42 AM, Lorenzo Paulatto <paulatz at gmail.com>
> wrote:
>
>> On 14/10/17 09:15, Rajesh wrote:
>> > Dear Prof Giannozzi,
>> > Thank you for your reply. But I need openmpi parallelization.
>>
>> openmpi is NOT OpenMP, the former is an open-source implementation of
>> MPI, the later is shared-memory vectorization based on compile-time
>> instructions. The first is required to run in parallel, you need both
>> for huge number of CPUs.
>>
>> What do you need exactly ?
>>
>> --
>> Lorenzo Paulatto - Paris
>>
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>
>
>
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>
> --
> Lorenzo Paulatto - Paris
>
>
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