Informix Machine Notes
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=================================
MACHINE SPECIFIC NOTES
FOR
IBM INFORMIX Dynamic Server 11.50.UC7 PRODUCT RELEASE
ON IBM AIX 5L 32bit
DATE: 11 May 2010
=================================
OS Information : Built on AIX 5L 5.3 Technology Level 4 SP 2.
Certified on AIX 6.1.
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 7.0.0.8
C Set ++ Runtime 8.0.0.0
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:
bos.rte.libc 5.3.0.51
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
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. IDS 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 desired.
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 7.0.4.27, IDS will upgrade the
GSKit on your machine to version 7.0.4.27. 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.6.0.0.3 or later
- bos.rte.libc:5.3.0.53 or later if running Technical Level 5
Check the following web site for the latest AIX system requirements
for IBM Informix Dynamic Server:
http://www.ibm.com/software/data/informix/ids/requirements/aix.html
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.
export LDR_CNTRL=LOADPUBLIC@USERREGS
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 ipldd11a.so. 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
$INFORMIXDIR/lib/libbsa.o.
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
follows:
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:
http://www.ibm.com/java/jdk/
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
format
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
"onsocimc".
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/ibsad001.so.
b. Create $INFORMIXDIR/lib/ibsad001.so as a symbolic link to the
library.
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.
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
"iosm11a.so". 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
functionality.
13. Pluggable Authentication Module (PAM)
PAM functionality is supported on AIX operating system. The PAM is
dependent on the libpam.so library supplied by the Operating System
vendor.
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
/etc/pam.conf.
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/cfwk.zip,
<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 libixspw.so.
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.
Example:
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
=============
1. Defect Number: idsdb00192113
Short Description:
IDS 11.50 hangs during startup on AIX 6.1 if both CIO and KAIO are enabled.
Workaround:
If Concurrent I/O (CIO) is preferred over KAIO, disable KAIO (set the
environment variable KAIOOFF to 1 before starting IDS) on AIX 6.1.
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 VII in doc/ids_defects_11.50.txt for the information
regarding defects fixed in previous release.
(C) Copyright IBM Corp. 2002, 2010
