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Status Future consideration
Workspace IBM i
Categories IBM i Access Family
Created by Guest
Created on Jan 16, 2024

RELATED IDEAS

Improve IBM i Access ODBC Driver simultaneous connections by eliminating constant Windows registry updates

Please refer to IBM case number: TS014016695. It will fix the problem when ODBC driver creates multiple connections to the same host name as the same time. We had an issue in our organization when network connection drops between Windows cloud server and IBM i cloud provider - it causes the ODBC driver to create new multiple connections to IBM i server at the same time (independent FastCGI processes), which causes the driver to hang (hanging time increases with the number of simulations connections) due to updates of the same Windows registry keys. CLI and jt400 drivers do not have this behavior.

Proposal summary:

is it possible to add the connection keyword that would prevent the driver to update specific registry keys at the connection, like resolved IP address, last and current successful connection times and others. We can initially run the driver without this keyword to allow driver to create all the keys, and subsequent calls will be made with this new keyword. I don't have the complete information on what registry keys are updated every time the driver performs the connection, but from what I see, the driver updates keys that are not super important to establish the connection.

Idea priority High
  • Guest
    Reply
    |     Mar 27, 2024

    In case TS015843903 I have documented that persistent accesses to the ~/.iSeriesAccess/cwb_userprefs.ini file causes very long login times (up to 20 seconds), and the accesses its equivalent of a registry key over 200 times per login:
    1815949 openat(AT_FDCWD, "/home/<Myhomedir>/.iSeriesAccess/cwb_userprefs.ini", O_RDWR|O_CREAT|O_APPEND, 0666) = 4

    1815949 flock(4, LOCK_EX) = 0

    1815949 fstat(4, {st_mode=S_IFREG|0664, st_size=1120, ...}) = 0

    1815949 lseek(4, 0, SEEK_SET) = 0

    1815949 read(4, "[CWB_CURRUSER\\Software\\IBM\\Clien"..., 4096) = 1120

    1815949 read(4, "", 4096) = 0

    1815949 flock(4, LOCK_UN) = 0

    1815949 close(4) = 0

    The majority of this accesses appear to be identical so it doesn't seem to useful and looks like an algorithmic issue from my perspective.

    If the home directory is not local (as in my scenario) this causes very, very long login times and affects the operational stability of our application or QA testing. Requiring our customers to change their configuration is not a vaild solution either, should they have the same scenario (a mounted home directory).

  • Guest
    Reply
    |     Feb 28, 2024
    Thank you for submitting your Idea to enhance IBM i Access Client Solutions (ACS). We understand the request and will consider it for a future update though no commitment is made nor implied.

    IBM Power Systems Development
  • Admin
    Carmelita Ruvalcaba Cevallos
    Reply
    |     Feb 13, 2024

    The CAAC has reviewed this IBM Idea and recommends that IBM view this as a high priority Idea that is important to be addressed.

    Need to make ODBC as easy to use as possible. This includes reusing existing connections.

    Background: The COMMON Americas Advisory Council (CAAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CAAC has a key role in working with IBM i development to help assess the value and impact of individual IBM Ideas on the broader IBM i community and has therefore reviewed your Idea.

    For more information about CAAC, see www.common.org/caac

    Carmelita Ruvalcaba- CAAC Program Manager

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