Re: [femm] high performance computing options for FEM

["Klevets" <klevets@xxxxxxxxxxxxx>]

Hi, Greg
Try to lower accuracy of the decision of a problem.
The accuracy, given by default, too high for the majority of problems.
Best regards,
Dr. N. Klevets

----- Original Message -----
From: "Dave Squires" <djsquires@xxxxxxxx>
To: <femm@xxxxxxxxxxxxxxx>
Sent: Thursday, May 17, 2001 11:12 PM
Subject: Re: [femm] high performance computing options for FEM


> Greg,
> How many nodes and elements in the total mesh?
> The 4-6 hours might not be unreasonable.
>
> I work with transistor level IC simulation at millions
> of transistors and simulations of overnight or even days
> is not uncommon depending on function and simulation
> time. The algorithms are similar for matrix solving
> and Newton iterations. So if your simulation is big
> with a small mesh and a million nodes/elements then
> 4-6 hours is not that bad.
>
> Regards,
> Dave Squires
>
> Greg Quinting wrote:
>
> > Members of the FEMM group ...
> >
> > I am a new member working on a large, static permanent magnet design
> > problem for magnetic resonance. Times to calculate range from 4-6 hours
> > at high mesh densities on a 550MHz PIII server with 400Mbytes RAM,
> > Windows 2000 Professional. I need to optimize the computational
> > efficiency while increasing the mesh densities.
> >
> > Does anyone have experience with any of these options? :
> >
> > 1. Single Pentium IV at high clock speeds.
> > 2. Dual processor Pentium servers
> > 3. Clusters under Windows 2000 Advanced Server or
> > Datacenter Server, where one might have 8 - 32 processors.
> >
> > Under options 2. and 3. would I need to get into the source code to take
> > full advantage of either architecture, e.g. libraries specifically
> > geared towards multithreading on dual processor and/or clusters? (Early
> > indications are to the affirmative.)
> >
> > Thanks,
> >
> > Greg
> >
> > ===
> >
> > > > Gregory R. Quinting, Ph.D.
> > > > Anasazi Instruments, Inc.
> > > > 4101 Cashard Ave. #103
> > > > Indianapolis, IN 46203
> > > > 317-783-4126
> > > > 317-783-7083 fax
> > > > aiinmr@xxxxxxx
> >
> >
> >
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