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# Re: [femm] high performance computing options for FEM

- To: <femm@yahoogroups.com>
- Subject: Re: [femm] high performance computing options for FEM
- From: "Klevets" <klevets@home.cris.net>
- Date: Fri, 18 May 2001 08:40:30 +0400
- Cc: <aiinmr@aol.com>
- Disposition-notification-to: "Klevets" <klevets@home.cris.net>
- References: <3B040E60.6DB5F8A6@iei.net> <3B042296.9057E895@plix.com>

    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@plix.com>
    To: <femm@yahoogroups.com>
    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@aol.com
    > >
    > >
    > >
    > > Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >

- References:
  - high performance computing options for FEM
    - From: Greg Quinting <gregq@iei.net>
  - Re: [femm] high performance computing options for FEM
    - From: Dave Squires <djsquires@plix.com>

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