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How do I configure an additional instance of IDS with NoSQL support?

Question & Answer


How do I configure an additional instance of Informix Dynamic Server with NoSQL support?


It may be desirable to have for example, both production and development/QA instances of IDS with NoSQL support enabled. The initial instance must be created during the installation. Additional instances can be created with the following steps:

  1. Make the necessary sqlhosts file changes and if applicable /etc/services entries.
    • Make a copy of either the sqlhosts file to the new file or just make a second copy of the entries within the file. Modify the entries appropriately.
    • Make the necessary changes to the /etc/services file.
  2. Create a new onconfig file and make the appropriate changes to it including new DBSERVERNAME and DBSERVERALIASES values from step #1. A good practice is to copy the first instance's onconfig file and make changes.
  3. Modify the environment:
    • Change INFORMIXSERVER to be the value of DBSERVERNAME set in the previous steps.
    • Change ONCONFIG to the name configured in step #2.
    • Change INFORMIXSQLHOSTS if a new sqlhosts file was created in step #1.
  4. A new NoSQL scheduler initialization file must be created in $INFORMIXDIR/etc/sysadmin. This file is used at instance initialization (oninit -i) to set up NoSQL. It follows this naming convention: sch_init_<DBSERVERNAME>.sql. This must be changed accordingly to configure another instance with NoSQL support. Copy this file to a new file with the appropriate DBSERVERNAME value and make the following changes to it:
    • LET json_listener = <filename>:
      • <filename> defaults to ""
      • Copy the original file to a new file with a different name and set the new name (<filename>) here.
      • See step #5 below for configuration changes in this file.
    • EXECUTE FUNCTION ifx_setup_system(<chunk_storage_path>):
      • <chunk_storage_path> defaults to $INFORMIXDIR/storage
      • Change this to a new storage directory that you created for the new instance.
  5. Make a copy of the file and change the following:
    • listener.port=#: set the port number that the new JSON listener process(es) will use for incoming requests
    • Localhost:#: set to the port number of the "lo_..." DBSERVERNAME connection
    • INFORMIXSERVER=?: set to "lo_..." DBSERVERNAME connection
  6. Finally, initialize the instance with "oninit -i."

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Document Information

Modified date:
16 June 2018