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Informix Machine Notes

Here you find actual Machine Notes to Informix Products that we prepared for you.

                            MACHINE SPECIFIC NOTES
            IBM INFORMIX Dynamic Server 11.50.UC9 PRODUCT RELEASE
                             ON IBM AIX 5L 32bit
                              DATE: 26 Jul 2011

OS Information : Built on AIX 5L 5.3 Technology Level 4 SP 2. 
                 Certified on AIX 6.1 and 7.1.

System Requirements

1.  This product was built on AIX 5L 5.3 Technology Level 4 SP 2 using the 
    following compilers:

    IBM XL C/C++ Compiler
    C Set ++ Runtime 

2.  AIX patch requirement:

    AIX 5L Technology Level 4 service pack 02 or higher is required at 
    runtime on your OS.

    AIX 5L 5.3:  
        APAR number IY66195
        APAR number IY71363
        APAR number IY83580

        If the system has the following libc version installed, APAR 
        number IY89597 is required:

        If the system is on Technology Level 5, the concluding service
        pack (CSP) is required. Technology Level 6 is recommended.

        If the system is on the following Technology Level, fix of IZ01229 
        is required: 

            Technology Level 6 - APAR number IZ01229
            Technology Level 7 - APAR number IZ15400

    AIX 6.1: 
        APAR number IZ13235

    AIX 7.1:

        September 2010 PTF for XL C for AIX, V11.1
3.  The IBM Informix Dynamic Server requires that the drivers for

        - Portable Streams Environment (PSE)
        - Asynchronous IO (AIO)

    be loaded on the AIX system where the IBM Informix Dynamic Server is
    used.  The IBM Informix Dynamic Server executables use entry points
    defined by these drivers.
    The PSE driver can be loaded using the "/usr/sbin/strload" command.  The
    AIO device can be enabled using either the AIX "smit" interface or by
    doing the following. 

    To enable AIO after subsequent reboots, issue the following commands 
    as root:
    	/usr/sbin/chdev -l aio0 -a autoconfig=available

    	/usr/sbin/mkdev -l aio0 

    For further information, refer to the AIX documentation.

4.  The UNIX graphical tools provided with this release require X Window
    system X11R6 and Motif 2.1 or later runtime libraries.

5.  The High Performance Loader utilities, onpload and ipload, require a 
    minimum of 35 MB of memory and 70 MB of swap space in order to run.

6.  If you are using Java UDRs, Please refer to "AIX Loader Domains" under 
    J/Foundation section for details.

7.  IBM Informix Server installer 

    a. The installer requires java in the PATH or passing "-javahome" option 
       when installing the server
    b. The installer uses AIX file system expansion. If file system expansion 
       is necessary for an installation, a warning will be included in the 
       preinstall summary dialog of the installation wizard. At that point, 
       the user can choose to cancel the installation if expansion is not 

       If the installation is performed in silent mode, file system expansion 
       occurs automatically without warning.

       Only the install file systems can be expanded. File system expansion of 
       temporary directories will not occur, and insufficient available space 
       in temporary directories will cause the installation to fail. The only 
       exception to this is during launcher execution.

8.  IBM Informix Dynamic Server uses the libraries and utilities provided by
    the IBM Global Security Kit (GSKit) for data encryption and Secure Sockets
    Layer (SSL) communication. The GSKit is bundled with the server and will
    be installed on your machine as part of the server installation process.
    Here are more details on the GSKit:

       a. The GSKit is also bundled with other IBM products and might
          already be present on your machine. If the GSKit was previously
          installed, but is older than version, IDS will upgrade the
          GSKit on your machine to version If GSKit is not
          installed, IDS will install GSKit in /usr/opt/ibm/gskta
          directory on your machine.

       b. The GSKit installation directory must have 30 MB of free disk space.

       c. The following packages must be installed on your system:
          - xlC.aix50.rte. or later
          - bos.rte.libc: or later if running Technical Level 5

Check the following web site for the latest AIX system requirements 
for IBM Informix Dynamic Server:

System Configuration

1.  Location of Shared Memory

    The ONCONFIG variable SHMBASE should be set to the following:

 	SHMBASE 0x30000000L

    If you are using Java UDRs, refer to the J/Foundation section for setting 
    the SHMBASE value.

2.  Environment Variables

    If you are using Java UDRs, set environment variable LDR_CNTRL to
    include the value "USERREGS" and "LOADPUBLIC" before starting IBM 
    Informix Dynamic Server.

Feature Notes  (alphabetized by feature)

1.  Greater Than 2GB Chunk & File Support 

    The "crfs" command can be issued with the "-a" option by root to enable 
    large file support.  This is essential to use the greater than 2 GB Chunk 
    & File Support features.

    crfs -a bf=true ... will create a large file enabled file system.

    Refer to the manual pages for more information on this Command.

2.  High Performance Loader

    User-defined conversion routines must be provided in a dynamic, shared
    library called This library is installed in the
    $INFORMIXDIR/lib directory. You can set the location of this file with 
    the HPL_DYNAMIC_LIB_PATH configuration parameter in file pointed to by 
    PLCONFIG environment variable. For more details, refer the manual
    "High-Performance Loader User's Guide". 

3.  Informix Storage Manager (ISM 2.2)

    This product is installed with IDS. The ISM XBSA shared library name is

4.  IPv6 Support 

    IBM Informix Server supports Internet Protocol Version 6 (128 Bit Internet 
    Addresses) as well as IPv4 (32 BIT ADDRESSES).
    In order for the machine name specified in the SQLHOSTS file to resolve
    to the correct IP address, the name services files on the Operating System
    should be correctly configured. If the machine has IPv6 address configured 
    and the listener thread is bound to an IPv6 address, then the name 
    resolution files /etc/netsvc.conf should be configured to fetch IPv6 
    address. Also use the appropriate /etc/hosts setting if local machine
    settings are used.

    For compatibility with older IBM Informix client and server products,
    assign the same hostname with both an IPv4 address and an IPv6 address.
    If the listener needs to be bound to an IPv4 address and the name services
    resolve the name in the order of the IPv6 address followed by IPv4 address,
    then an explicit IPv4 address needs to be put in nodename field of SQLHOSTS 
    file. Client applications should also use the same setting.

5.  ISMP - InstallShield Multi-Platform

    A JRE is embedded in the installation program. If you have problems with
    the embedded JRE, you can use your own. The minimum recommended JRE version
    is 1.4.2.

6.  J/Foundation (Java in the Server)

    J/Foundation supports the JRE 5.0 release from IBM which uses the AIX
    native threads based Java Virtual Machine.

    The JRE 5.0 is available under $INFORMIXDIR/extend/krakatoa/jre and
    should be used with J/Foundation.

    To use this JRE, set the value of the ONCONFIG variable JVPJAVAHOME as
        JVPJAVAHOME    <jvphome>/jre
            where <jvphome> is $INFORMIXDIR/extend/krakatoa

    For developing Java UDRs used with J/Foundation, use JDK 5.0 which
    can be downloaded from IBM's Java website:
    For IBM Informix Dynamic Server ONCONFIG settings for J/Foundation,
    refer to "onconfig.std" in $INFORMIXDIR/etc.

    Location of Shared Memory:
    When using IBM Informix Dynamic Server with J/Foundation, the ONCONFIG
    variable SHMBASE should be set to the following:
        SHMBASE 0x40000000L

    On AIX, the Java heap allocated by the Java Virtual Machine is created
    in the lowest available segment.  If SHMBASE is set to 0x30000000L, the
    Java heap will be created at an address after the server shared memory
    segments. This can cause the server to fail with an assertion error if
    additional shared memory segments are dynamically allocated later.

    When SHMBASE is set to 0x40000000L or above, the 3rd segment (0x30000000) 
    is available for the JVM's Java heap, and the server can dynamically add 
    shared memory segments beyond 0x40000000.

    If you must use 0x30000000L as SHMBASE, allocate enough shared memory
    segments before starting the J/Foundation server. Refer to the to the 
    J/Foundation Developer's Guide for information on how to preallocate 
    virtual shared memory segments.

    Using JVM Heapsize >= 128 MB
    With JDK 1.4.x, creating the JVM with a heapsize >= 128 MB fails with the
    following error:

        Unable to alloc heap of requested size, perhaps the maxdata value is
        too small - see README.HTML for more information.
        **Out of memory, exiting**       

    The IBM Java team acknowledges that this is a side-effect of the JVM
    memory management model chosen for JDK 1.4.x

    If you need to use JVM heapsize >= 128 MB, enable the use of the AIX
    Large Memory Model feature to avoid the above mentioned problem.
    This feature can be enabled by setting the LDR_CNTRL environment variable:

        export LDR_CNTRL=MAXDATA=<# of segments reserved for data heap>

    For example:

        export LDR_CNTRL=MAXDATA=0x20000000

    In this example, access is enabled to 2 segments (where each segment is
    256 MB). Note that the allocation is done up-front and reserved;
    therefore, the value chosen should be based on the needs of your Java
    UDRs. If the required JVM heapsize is 128 or 256 MB, 0x20000000 is
    sufficient. Also, since this allocation is reserved for the JVM, the
    SHMBASE value in the server ONCONFIG file must be set appropriately.
    In general, compute the value of SHMBASE as follows:
        SHMBASE = <value of LDR_CNTRL=MAXDATA> + 0x30000000

    For example, if LDR_CNTRL=MAXDATA=0x20000000, SHMBASE can be set to
    0x50000000 or above.

    This environment variable should be set before starting the IBM Informix 
    Dynamic Server instance used for executing Java UDRs. If the server is 
    already up, bring down and then bring up the server for the environment 
    variable to take effect.

    AIX Loader Domains
    If multiple shared libraries are loaded onto two VPs, one of which is
    a Java VP, and the libraries are not loaded in the same order on each
    VP, executing a function from the libraries can cause the IBM Informix
    Dynamic Server to core dump with the following message in online.log:

        09:35:58  Assert Failed: Exception Caught. Type: MT_EX_OS, Context: ill
        09:35:58   Who: Session(15, informix@ibms70, 46918, 1075033896)
                        Thread(41, sqlexec, 4010c7d8, 3)
                        File: mtex.c Line: 372
        09:35:58   Action: Please notify Technical Support.

    You would typically encounter this error if your application is using
    both C UDRs and Java UDRs.

    To resolve this problem, the AIX loader domains concept is used. The
    loader domain provides a means of loading shared libraries at the same
    virtual address in a set of processes. The loader domain file is created 
    during the installation of the IBM Informix Dynamic Server. This is 
    installed as "/var/adm/ifx_loader_domain".

    IBM Informix Dynamic Server with J/Foundation on AIX requires the loader 
    domain file "/var/adm/ifx_loader_domain" to exist at all times. If the 
    file does not exist, create it as superuser using the following commands:

        touch /var/adm/ifx_loader_domain
        chgrp informix /var/adm/ifx_loader_domain
        chmod 660 /var/adm/ifx_loader_domain
    Power7 Machine Server Onconfig Settings for J/Foundation
    The current Krakatoa JVM 5.0 does not load for Power7 machine,
    To execute Java UDRs on Power7 machine disable the JIT compiler
    using the following onconfig setting
    set JVPARGS   -Djava.compiler=NONE
    This will enable the Krakatoa JVM 5.0 to load successfully.

7.  Kernel Asynchronous I/O (KAIO)

    KAIO is enabled by default on this platform. The AIO driver must be
    configured into the AIX system for KAIO to work. Instructions are
    provided in the "System Requirements" section above. If AIO is not
    configured, the IBM Informix Dynamic Server will report the following
    error while starting:

         0509-037 System error: error data is: oninit
         0509-023 Symbol kaio_rdwr in /usr/lib/libc.a is not defined.
         0509-023 Symbol listio in /usr/lib/libc.a is not defined.
         0509-023 Symbol acancel in /usr/lib/libc.a is not defined.
         0509-023 Symbol iosuspend in /usr/lib/libc.a is not defined.
         0509-022 Cannot load library libc.a[aio.o].
         0509-026 System error: Cannot run a file that does not have a valid

    To disable KAIO, set the environment variable KAIOOFF.

         KAIOOFF=1 ; export KAIOOFF      ( for Bourne or Korn shell )
         setenv KAIOOFF 1                ( for C shell )

8.  Network Protocols  

    The following protocol(s)/interface(s) are supported on this platform:
        Berkeley sockets using TCP/IP
        IPC using stream pipe (implemented using Unix Domain Sockets)

        To use sockets with TCP/IP:

            a. NETTYPE in the ONCONFIG file and the nettype field in the
               sqlhosts file entry must contain "onsoctcp".

            b. To enable an IBM Data Server Client to connect to Informix 
               Dynamic Server, NETTYPE in the ONCONFIG file and the value data 
               of protocol in the sqlhosts file entry must contain "drsoctcp"

               If a CLI or JCC client wants to connect to IDS via DRDA while
               supporting SQLI connections you could add a DBSERVERALIASES entry
               to ONCONFIG which corresponds to the sqlhosts file.

        To use IPC (interprocess communication) with stream pipe:

            a. NETTYPE in the ONCONFIG file and the nettype field in the
               sqlhosts file entry must contain "onipcstr".

    Fast poll is supported with TCP/IP and stream pipe interfaces. FASTPOLL 
    in the ONCONFIG file can be set to 0 to disable the fast poll. By default 
    the fast poll is enabled (value is 1).

    The protocol used for supporting MaxConnect on this platform is

9.  No Age (Disable Priority Aging)

    The no aging feature that disables priority aging of CPU virtual processors 
    by the operating system can be activated by setting the noage option of the 
    VPCLASS configuration parameter for the CPU virtual processors. For example,
    the following ONCONFIG entry specifies that there are 8 CPU VPs, each 
    without aging:

    VPCLASS cpu,num=8,noage

    When NOAGE is activated, all oninit processes will run at priority 60
    with fixed priority round robin type scheduling.

    Note: The NOAGE configuration parameter is deprecated; it is replaced by 
    the VPCLASS configuration parameter with the noage option.

    To override the default priority value for CPU VP class, set the 
    environment variable INFX_CPUVP_PRIORITY to the desired priority,
    within limits (50 to 90) before starting the server.

    The server checks and sets the CPU VP process to the defined priority
    if the defined value is within the above range.

10. OnLine Backup and Restore (ON-Bar)

    Some of the functions invoked by ON-Bar are in a shared library
    supplied by third party storage management vendors. For ON-Bar to
    access these functions, the library must be installed in one of the
    three ways noted below.

        a. Rename the library to $INFORMIXDIR/lib/

        b. Create $INFORMIXDIR/lib/ as a symbolic link to the

        c. Set the BAR_BSALIB_PATH parameter in $INFORMIXDIR/etc/$ONCONFIG
           to the full pathname of the library.

    Previously, the shared library file was needed to be in the /usr/lib
    directory. Now it needs to be under $INFORMIXDIR/lib.

    Informix Interface for Tivoli Storage Manager (TSM) is supported on this 
    platform. The interface is built with TSM API version 5.3.2.

11. OnSNMP

    The SNMP agent for OnSNMP is based on SNMP Research (SNMPR).
12. Optical
    The name of the IBM Informix shared library for Optical on AIX is
    "". This library must be located in $INFORMIXDIR/lib  
    (or must have a link provided in $INFORMIXDIR/lib). Refer to the
    "Optical Subsystem Guide" for more information about enabling optical

13. Pluggable Authentication Module (PAM)

    PAM functionality is supported on AIX operating system. The PAM is 
    dependent on the library supplied by the Operating System 

    Use of PAM can be enabled or disabled by the system administrator. By 
    default, IBM IDS will use the traditional authentication mechanism in 
    order to avoid widespread changes required by the users.

    The PAM service identifies the PAM module. This PAM module typically
    resides in /usr/lib/security and its parameters are listed in

14. Processor Affinity

    The processor affinity feature, that allows the pinning of a CPU VP 
    processor to a physical processor in a multi-cpu configuration, is 
    supported on this platform. 

15. Single Sign On (SSO) 

    This feature requires AIX system library libgssapi_krb5 to be installed 
    on the system. This library is included in krb5.toolkit.adt (Network 
    Authentication Service App. Dev. Toolkit).
16. Shared Memory Residency

    Shared Memory Residency is supported. This feature can be enabled by 
    setting ONCONFIG parameter RESIDENT to a non-zero value.

17. Secure Sockets Layer

    IBM Informix Dynamic Server uses the libraries and utilities provided by
    the IBM Global Security Kit (GSKit) for Secure Sockets Layer (SSL)
    communication. The GSKit provides iKeyman utility (gsk7cmd, gsk7ikm)
    and a non-java utility (gsk7capicmd) for managing digital certificates
    necessary for SSL communication.

       a. Product prerequisite for iKeyman utility:
          The iKeyman utility requires the IBM Java Runtime Environment
          (JRE) or IBM Java Development Kit (JDK) version 1.3.1, 1.4.1 or
          higher with the Java Cryptography Extension (JCE) security package.

       b. Environment for iKeyman utility:
          - JAVA_HOME must be set to the JRE/JDK installation directory
          - PATH must include <JRE/JDK installation>/jre/bin
          - CLASSPATH must include <GSKit installation>/classes/,
            <GSKit installation>/classes/gsk7cls.jar and
            <JRE/JDK installation>/jre/lib/ext/ibmpkcs11.jar

       c. Before uninstalling GSKit, verify that it is not needed on your 
          system. It is possible that software other than Informix Dynamic 
          Server requires GSKit. Uninstalling entails removing GSKit 
          packages as follows:

          To remove packages, as root user run the following 
          installp -u -g -V2 gskta.rte

       d. If you want to restore Secure Sockets Layer capability after you 
          have uninstalled GSKit, see the readme file in $INFORMIXDIR/gskit 
          for how to install GSKit.

18. Simple Password Communications Support Module

    The name of the IBM Informix shared library for Simple Password CSM
    on AIX is

19. Strong authentication via the authenticate method

    The ability to use the AIX authenticate() method is added on the AIX
    platform. This allows the database administrator to configure the
    authentication mechanism as they see fit. This feature does not support
    challenge and response while authenticating.

    To configure a particular port the system administrator will need to add
    an entry, s=4, to the options field in the sqlhosts file. When this entry
    is present in the server sqlhost file the new authentication method will
    be used.

    srvname   olsoctcp   machname   prtname   s=4

    Note: When using the new authentication method, implicit connections
    will not be allowed. Since implicit connections rely on the trusted
    host mechanism in the server, it is not allowed in conjunction with the
    authenticate method.

    When using CSS/CSM the new authentication method will be disabled. 

Features not Supported

1.  Shared Disk Secondary Servers

Known Defects

Refer to section I in doc/ids_defects_11.50.txt for the information 
regarding known issues.

Defects Fixed in current Release

Refer to section II in doc/ids_defects_11.50.txt for the information 
regarding defects fixed in this release.

Defects Fixed in Previous Releases

Refer to sections III to VIII in doc/ids_defects_11.50.txt for the information
regarding defects fixed in previous release.

(C) Copyright IBM Corp. 2002, 2011

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