Search found 5 matches

by ng00822
Sun Mar 02, 2014 12:35 am
Forum: VTSTTools
Topic: NEB running on multiple nodes
Replies: 1
Views: 7634

Re: NEB running on multiple nodes

I think I narrowed the problem to bad behavior by sge_execd, part of the UGE/SGE cluster management system. It is causing a ~30x slowdown during the DAV iterations, ~8x slowdown during RMM-DIIS. Need to get that investigated.
by ng00822
Thu Feb 27, 2014 8:21 pm
Forum: VTSTTools
Topic: NEB running on multiple nodes
Replies: 1
Views: 7634

NEB running on multiple nodes

Hi guys, I am currently doing an NEB run with one image/node, where each node has 16 cores (2 sockets, 8 cores/socket). I found for normal VASP optimization runs that using KPAR=2 and NPAR=1 seems to work best, along with "-bysocket -bind-to-socket" mpirun time parameters (the mpirun param...
by ng00822
Thu Jan 02, 2014 3:10 am
Forum: VTSTTools
Topic: Continuing NEB with CI-NEB
Replies: 1
Views: 5868

Continuing NEB with CI-NEB

Basic question, if I turn on LCLIMB on an already converged NEB calculation, it will finish after a single iteration because the forces are converged. Is there a way to force the climbing mode? Should I just lower the convergence criteria? Thanks.
by ng00822
Tue Sep 17, 2013 8:34 pm
Forum: VTSTTools
Topic: Energy mismatch between NEB/Single Point
Replies: 2
Views: 7202

Re: Energy mismatch between NEB/Single Point

That was indeed the case, I wouldn't have ever thought of that, thank you!
by ng00822
Tue Sep 17, 2013 3:33 am
Forum: VTSTTools
Topic: Energy mismatch between NEB/Single Point
Replies: 2
Views: 7202

Energy mismatch between NEB/Single Point

Hi Prof Henkelman, Firstly, thanks for all of your (and your team's) work on enabling, supporting, and improving VTST over the years! I had a problem recently about differences in energy values being reported from an NEB run, and the corresponding single point energy calculation for the same images....