critical data access issue

Discussion in 'Cadence' started by Sylvio Triebel, Jun 26, 2007.

  1. Hello,
    It seems that the database access of icfb under heavy network load tends to be unstable.
    (CDBA, icfb version 5.10.41.500.3.54)
    While ddGetObj(..) returns a value dbOpenCellViewByType(..) returns sometimes nil.
    We can exclude permission and mount problems (accessible from a shell started from
    the icfb)
    In most cases helps a restart of the framework.

    Is that problem known?
    Is there some timeout implemented in dbOpen??
    Since a repeated call of dbOpenCellViewByType() does'nt helt there seems to
    be some caching.
    Since it is not reproducable it is not easy to create testcases...
    With low network load (LAN) we never experienced such type of problems.

    Best regards,
    Sylvio
     
    Sylvio Triebel, Jun 26, 2007
    #1
  2. This is almost certainly outside of DFII's control. My guess is that something
    is up with the NFS setup of your machines so that they're not getting updates
    often enough, and perhaps the NFS caches are out of date.

    Regards,

    Andrew.
     
    Andrew Beckett, Jun 28, 2007
    #2
  3. Hi Andrew,
    we found the problem: this version and newer versions of icfb have this problem,
    if it runs under Solaris and if the sum of the string length's of cell and view name
    exceed 255 characters.
    On Linux everithing is fine - older versions for Solaris don't have a problem either.
    It is already being reported to Cadence...

    My guess, that it is related with network load is only half-true. If the LSF queue of
    Linux machines is full (-> high network traffic ;-) then some
    jobs have been dispatched to Solaris.......

    Regards,
    Sylvio
     
    Sylvio Triebel, Jul 10, 2007
    #3
  4. Sylvio Triebel

    Marc Heise Guest

    Hi Sylvio,

    I got that call and can reproduce it.

    Marc
     
    Marc Heise, Jul 10, 2007
    #4
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.