Search found 77 matches

by Daniel Konstantinovsky
Mon Aug 05, 2019 4:05 pm
Forum: OpenMM
Topic: faster trajectory writing?
Replies: 2
Views: 90

faster trajectory writing?

Hello, I'm running some MD where I need to save frames _very_ frequently. Using DCDReporter(), it seems that file writing is the performance bottleneck in my case, which isn't ideal. Do you have any general tips on how I could speed this up? I can't speed up my cluster's file system, but maybe there...
by Daniel Konstantinovsky
Tue Jul 16, 2019 7:37 am
Forum: OpenMM
Topic: PBC question
Replies: 1
Views: 87

PBC question

If I use PDBFile.writeFile() to save a result of a simulation with PBC, can I use that file as an input for a subsequent simulation with the same PBC? I've been using the context.getState(...).getPositions() method to get coordinates. If I turn on the enforcePeriodicBox option in getState(), the str...
by Daniel Konstantinovsky
Wed Jun 12, 2019 12:52 pm
Forum: OpenMM
Topic: minimizeEnergy() reporter
Replies: 1
Views: 129

minimizeEnergy() reporter

It would be nice to be able to monitor energy minimization with StateDataReporter(). I haven't been able to make it work. Is there no link between simulation.minimizeEnergy() and simulation.reporters?
by Daniel Konstantinovsky
Tue Jun 11, 2019 3:06 pm
Forum: OpenMM
Topic: AMOEBA FF for NPT, NVT
Replies: 3
Views: 200

Re: AMOEBA FF for NPT, NVT

Actually never mind just saw the documentation re Langevin integrator :-)
by Daniel Konstantinovsky
Tue Jun 11, 2019 3:03 pm
Forum: OpenMM
Topic: AMOEBA FF for NPT, NVT
Replies: 3
Views: 200

Re: AMOEBA FF for NPT, NVT

Thank you! Was worried barostat wasn't supported for AMOEBA. One more q: John Chodera wrote in a old chat "Note that there can be issues when using finite-timestep MD without Metropolization together with a Monte Carlo barostat. The MC samples from the exact Boltzmann distribution, while the MD samp...
by Daniel Konstantinovsky
Tue Jun 11, 2019 12:27 pm
Forum: OpenMM
Topic: Malloc error
Replies: 9
Views: 554

Re: Malloc error

I read somewhere that this is a MacOS problem has something to do with permissions, hard to fix (https://stackoverflow.com/questions/223 ... ing-termin).
by Daniel Konstantinovsky
Tue Jun 11, 2019 12:25 pm
Forum: OpenMM
Topic: AMOEBA FF for NPT, NVT
Replies: 3
Views: 200

AMOEBA FF for NPT, NVT

Hi everyone,

I'm very interested in using the AMOEBA FF. I need to equilibrate NPT and NVT before production run. However I saw in OpenMM documentation that "The virial is not calculated for any force." Can you do NPT in OpenMM with AMOEBA?

Thanks!