[gmx-users] Performance problems with more than one node

2008-09-25 Thread Tiago Marques
Hmmm... I don't have any .pdb file, what can I look for then? Best regards, Tiago Marques On Tue, Sep 23, 2008 at 5:48 PM, Jochen Hub [EMAIL PROTECTED] wrote: Tiago Marques wrote: I don't know how large the system is. I'm the cluster's system administrator and

Fwd: [gmx-users] Performance problems with more than one node

2008-09-25 Thread Tiago Marques
We currently have no funds available to migrate to infiniband but we will in the future. I thought on doing interface bonding but I really think that isn't really the problem here, there must be something I'm missing, since most applications scale well to 32 cores on GbE. I can't scale any

Re: [gmx-users] Performance problems with more than one node

2008-09-25 Thread vivek sharma
Hi friends, I am also facing the similar problem when tried to scale gromacs for more number of processors , I have tried one job using gromacs on EKA, in an attempt to scale it for more number of processor I am able to get the reduction in simulation time upto 20 processors, it is taking more

Re: [gmx-users] Performance problems with more than one node

2008-09-25 Thread vivek sharma
Sorry for the incomplete mail...i sent it by mistake what i want to add is I am not able to run it with any of the option.any help and suggestion will be highly appreciated. FYI size of my system is around 45000 atoms. Thanks in advance, Vivek 2008/9/25 vivek sharma [EMAIL PROTECTED] Hi

Re: [gmx-users] Performance problems with more than one node

2008-09-25 Thread Justin A. Lemkul
vivek sharma wrote: Sorry for the incomplete mail...i sent it by mistake what i want to add is I am not able to run it with any of the option.any help and suggestion will be highly appreciated. FYI size of my system is around 45000 atoms. The performance will depend upon a lot of

[gmx-users] HEME topology

2008-09-25 Thread Shozeb Haider
Hi, I am trying to simulate HEME in a water box. I generated HEME topology based on the parameters in the ffG43a2.rtp file. When I run a short burst of unrestrained dynamics, it does not remain planar. I understand that there might be some buckling but not to the extent that I am observing.

[gmx-users] angles125 test fails on Altix4700 with gcc or intel

2008-09-25 Thread Philip Blood
Hi, I recently installed gromacs in single precision on an Altix4700 using either intel 10.1.0008 or gcc 4.2.3 and in both cases the installation passes all of the gmxtests except for angles125. The differences in the energy appear to be rather significant (see below). Can anyone offer an

Re: [gmx-users] urey-bradley format

2008-09-25 Thread David van der Spoel
Piotr Adam Pieniazek wrote: Hi, I'm trying to put in a Urey-Bradly type term into my force field, but the format is not specified in the manual. atom_1 atom_2 atom_3 5 angle angle_force bond bond_force I'm particularly confused about the last two terms. I've tried both combinations and

[gmx-users] HEME topology

2008-09-25 Thread Chris Neale
Take a look at the charm file: top_all22_prot.inp Specifically, RESI HEME ___ gmx-users mailing listgmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/search before posting!

[gmx-users] Re: help on parameterization

2008-09-25 Thread David van der Spoel
Julio Benegas wrote: Dear David, We are sorry to bother you on perhaps a simple question, but elusive to us. We want to run a MD simulation of three units of chitosan. We are using Gromacs ffG53A6 force field and we can not find in the corresponding library the parameters corresponding to the

[gmx-users] see some line in vmd

2008-09-25 Thread Morteza Khabiri
Dear gmx user I have a box which contain protein and solution. Before running I minimized it very well and also system is running. After 2 ns when I saw the trajectory in vmd I saw that ther is some lines like bondes in the system. eg, between oxygen group of one water molecule in one part of box

Re: [gmx-users] see some line in vmd

2008-09-25 Thread Justin A. Lemkul
Morteza Khabiri wrote: Dear gmx user I have a box which contain protein and solution. Before running I minimized it very well and also system is running. After 2 ns when I saw the trajectory in vmd I saw that ther is some lines like bondes in the system. eg, between oxygen group of one water

[gmx-users] dna-protein simulation

2008-09-25 Thread prasun kumar
Hello Tsjerk, while running pdb2gmx I was getting error like h1 is not found while assigning improper dihedral so I just modified the forcefield(ffG43a1.rtp)file by default it was considering ADE also inplace of considering DADE part only,so I removed ADE,CYT,GUA part also(is it right to do

[gmx-users] Threading in GROMACS

2008-09-25 Thread Jagan Mohan
Hello, Just wanted to know if GROMACS 3.3.3 supports multi threading that is can run four instances of mdrun in the same machine which has 4 cores... Thanks in advance. ___ gmx-users mailing listgmx-users@gromacs.org