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Conference 7.286::digital

Title:The Digital way of working
Moderator:QUARK::LIONELON
Created:Fri Feb 14 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:5321
Total number of notes:139771

4156.0. "Need help Specifying Computer Needs for " by PCBUOA::HEDRICK () Thu Sep 28 1995 13:55

    Seeking help from someone to identify the computer horsepower needed
    for complex multi. interactive aircraft simulation project that is
    proposed.  Hope to use Alpha based Multi Processor Systems in a Series
    or Parallel mode.
     
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4156.1 A rough cutODIXIE::GARAVANOThu Sep 28 1995 15:2727
    there are several way to apporach this - but they all require the
    answer to the following:
    
    Software: Are you looking for COTS? if so there is some simulation
    software that helps start the process - but it needs to be virtual reality
    not just sim or the coordinates will not be in realtime - Ian Ellery @ORO
    can help you with the VR software availablle on Alpha
    
    Hardware: Is rack mounting a requirement? depending on the need to keep
    the simulation results and any and all manipulation etc - the following
    would be my cut:
    
    At least two 2100 5/250,  8200 or 8400 5/300 systems with 512 to 1
    gigabyte of memory to start. Make it an ASE cluster - Use dual HSJ40
    with KZPSA-BB (FWD) (thats the fastest available I/O option other than
    IPI) - use rz29's in either a sw800 or sw500 - for Display use the
    Evans Sutherland boards PCI based with VRC21-PA for the monitor. The
    only other option would be a VR headset - 
    
    If reception of incoming realtime data a part of the equation - use the
    upcomning VME 64 PCI interface from CSS - that will provide the
    bandwidth to handle large data streams
    
    Hope this helps
    
    
    
4156.2RLTIME::COOKThu Sep 28 1995 18:2931
    
>    If reception of incoming realtime data a part of the equation - use the
>    upcomning VME 64 PCI interface from CSS - that will provide the
>    bandwidth to handle large data streams


Are you assuming this is a legacy simulation?  I didn't read that into .0.
If there is VME in this system, you may want to consider the AXPvme 230 with
and FDDI PMC I/O card.  This could give you quite a bit of front end number
crunching with good band width back to the main simulation systems.  Or, for
a more traditional approach, racks of AXPvme 230s with VMIC reflective memory
PMC cards...just don't call me to debug the simulation.  :-)

Lots of ways to go, without a lot of detail in .0.  As in, I'm assuming this 
is a training simulator and not "hardware in the loop" systems simluation.  Do
you need freeze data and roll back?  Reflective memory helps here since 
simulation data can be kept in reflected pages and frame by frame data capture
can be done. 

Anyway, every simulation heavy company I've worked with Mickey D, Boing,
Lockhead, they all had their own set of simulation benchmarks to determine CPU 
suitability.  If your working with one of the majors, you may want to talk to
them about this.

Good luck,

Al Cook
    
    
    

4156.3Engage CSS directly!NCMAIL::SCHOLZMon Oct 02 1995 10:546
    Engage CSS directly.  They have this expertise.  Launch a call into
    Mark Woodbury at 264-0850.  They also have complementary technologies
    that handle continuous I/O into a rack of Alpha's.
    
    Regards,
    Steve