Re:Re: concurrent users

  • 1.  Re:Re: concurrent users

    Posted 04-14-2008 11:35 AM
    Hi Wayne:

    You're likely to get answers all over the board on this one,
    but perhaps that is exactly what you want.

    Other than some obvious restraints, like virtual memory,=20
    network bandwidth, CPU cycles, etc., I have never heard of
    an=20 IDMS system that could not support the maximum
    concurrent=20 number of users (albeit I had a lot of fun during
    the Cullinet=20 years doing performance and tuning consulting
    to achieve=20 exactly that result ;-}} ).

    That said, I suspect you may be asking about life in the
    'new=20 world', with web services, etc.

    I have personally simulated 10K users hitting an ASP page
    that=20 connected/retrieved minimum data from an IDMS
    database. I=20 don't have all of the details anymore, but the
    overall response=20 was about 1.17 seconds running the
    simulation for about 15=20 minutes. This was done on CA iron in
    2003/2004 on a R14.1 CV.

    Of course, it was just a simulation, but it illustrates that=20
    you can push a rather large load through a CV if you have=20
    enough back-end resources.
    Again, just my 2cents...your results WILL vary...

    Please feel free to contact me offline (

    Tom Schoenborn
    TA Schoenborn & Associates LLC