Configuring IOCP (AIX)

Configuring I/O completion ports (IOCPs) on AIX® servers is not required for the installation of Db2® software. However, this configuration step is recommended for performance purposes. You need to perform these steps on each host you want to participate in the Db2 instance. AIX 5.3 TL9 SP2 and AIX 6.1 TL2 have the I/O completion ports (IOCP) file set included as part of the base installation. However, if the minimum operating system requirements were applied using an operating system upgrade rather than using a new operating system installation, you must configure I/O completion ports (IOCP) separately.

To configure IOCP:

1. To check whether the IOCP module is installed on your system, enter the following command:

    $ lslpp -l bos.iocp.rte

   The output should be similar to that in the following example:

   Fileset                     Level     State       Description
   ----------------------------------------------------------------------------
   Path: /usr/lib/objrepos
     bos.iocp.rte              5.3.9.0   APPLIED     I/O Completion Ports API
   
   Path: /etc/objrepos
     bos.iocp.rte              5.3.0.50  COMMITTED   I/O Completion Ports API

2. Check whether the status of the IOCP port is Available by entering the following command:

   $ lsdev -Cc iocp

   The output should be as follows:

    iocp0 Available  I/O Completion Ports

3. If the IOCP port status is Defined, perform the following steps:
   1. Log in to the server as root.
   2. Enter the following command:

      # smitty iocp

   3. Select Change / Show Characteristics of I/O Completion Ports.
   4. At system restart, change the configured state from Defined to Available.
   5. Make the state change effective by either rebooting the system or entering the cfgmgr command.
   6. Confirm that the status of the IOCP port changed to Available"by entering the following command again:

      $ lsdev -Cc iocp