<div dir="ltr"><div dir="ltr">Yes, a fast file system. NFS via Ethernet may still be usable as long as you do not have heavy or frequent I/O. Writing via NFS is especially slow.</div><div dir="ltr"><br></div><div>For your information: <a href="https://gitlab.com/QEF/q-e/-/issues/299">https://gitlab.com/QEF/q-e/-/issues/299</a></div><div dir="ltr"><br></div><div>Paolo</div><div><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 22, 2021 at 10:15 AM Takahiro Chiba <<a href="mailto:takahiro_chiba@eis.hokudai.ac.jp">takahiro_chiba@eis.hokudai.ac.jp</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Dr. Giannozzi,<br>
<br>
By the expression "parallel file system", you meant fast file systems<br>
such as LUSTRE, not NFS via ethernet, right?<br>
<br>
---Sender---<br>
Takahiro Chiba<br>
Undergraduate at Hokkaido University<br>
Expected graduation date: Mar. 2021<br>
Expected to be a graduate student at HU from Apr. 2021<br>
<a href="mailto:takahiro_chiba@eis.hokudai.ac.jp" target="_blank">takahiro_chiba@eis.hokudai.ac.jp</a><br>
-----<br>
<br>
2021年3月19日(金) 6:14 Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com" target="_blank">p.giannozzi@gmail.com</a>>:<br>
><br>
> On Thu, Mar 18, 2021 at 6:59 PM Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com" target="_blank">p.giannozzi@gmail.com</a>> wrote:<br>
><br>
>> The "wfcdir"" option is no longer implemented, if I remember correctly.<br>
><br>
><br>
> I didn't remember correctly: it is still implemented. As I mentioned earlier, though, it is expected to work only for a subset of all possible use cases. In particular, it should work for the self-consistent code, but I don't know whether it has ever been tested in NEB.<br>
><br>
> Paolo<br>
><br>
><br>
>> It was adding unneeded complexity to an already (too) complex I/O code, it did not work for many use cases, it was useful only for the rather peculiar case of a parallel machine with no parallel file system. Unfortunately the documentation was not updated to reflect its demise.<br>
>><br>
>> Paolo<br>
>> --<br>
>> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
>> Univ. Udine, via delle Scienze 206, 33100 Udine, Italy<br>
>> Phone +39-0432-558216, fax +39-0432-558222<br>
>><br>
><br>
><br>
> --<br>
> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
> Univ. Udine, via delle Scienze 206, 33100 Udine, Italy<br>
> Phone +39-0432-558216, fax +39-0432-558222<br>
><br>
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_______________________________________________<br>
Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu" rel="noreferrer" target="_blank">www.max-centre.eu</a>)<br>
users mailing list <a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a></blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 206, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div></div>