Informix Machine Notes
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================================= ================================= MACHINE SPECIFIC NOTES FOR HCL Informix Database Server 14.10.FC5 PRODUCT RELEASE On Linux x86_64 DATE: 24 Feb 2021 ================================= OS Information : Built on Red Hat Enterprise Linux ES release 7.4 (Maipo). System Requirements =================== 1. This product was built on Red Hat Enterprise Linux ES release 7.4 (Kernel: 3.10.0-693, Glibc: 2.17) for x86_64 compatible processors. The following compilers were used: gcc and c++ compiler 4.8.5 20150623 (Red Hat 4.8.5-16) for GLS and ICU gcc and c++ compiler 7.3.1 20180303 (Red Hat Devtoolset-7) for the server The following package have to be installed on your Linux system: libaio-0.3.109 libgcc-4.8.5 libstdc++-4.8.5 ncurses-5.9 pam-1.1.8 elfutils-libelf-0.168 Please note that this version of Informix does not support Linux environments with kernel version lower than 3.10.0-693 For Informix Blade development GNU linker may need to be updated to GNU ld version 2.28-11.el7 or newer Update is not needed for install and operation of Informix This product has been certified on: - Red Hat Enterprise Linux ES release 8.0 (Kernel: 4.18.0-80, Glibc: 2.28-42). The following packages have to be installed: libaio-0.3.110 libgcc_s1-8.2.1 libstdc++6-8.2.1 ncurses-utils-6.1-7 pam-1.3.1-4 elfutils-libelf-0.174-6 - SUSE SLES 12.3 (Kernel: 4.4.73-51, Glibc: 2.22-61). The following packages have to be installed: libaio-0.3.109 libgcc_s1-6.2.1 libstdc++6-6.2.1 ncurses-utils-5.9-40 pam-1.1.8-23 libelf1-0.158-6 - SUSE SLES 15 (Kernel: 4.12.14-25, Glibc: 2.26-13). The following packages have to be installed: libaio-0.3.109 libgcc_s1-8.2.1 libstdc++6-8.2.1 ncurses-utils-6.1.3 pam-1.3.0-6.3.1 libelf1-0.168-2 - Ubuntu Server Edition 16.04 LTS (Kernel: 4.4.0-142, Glibc: 2.23). The following packages have to be installed: libgcc 5.4.0 libstdc++6 5.4.0 libncurses5 6.0 libpam 1.1.8 libelf1-0.165-3 - Ubuntu Server Edition 17.10 (Kernel: 4.13.0-21, Glibc: 2.26). The following packages have to be installed: libgcc 7.2.0 libstdc++6 7.2.0 libncurses5 6.0 libpam 1.1.8 libelf1-0.170-0 libelf1-0.170-0 The bc utility is required by the product installer, and needs to be installed on Ubuntu. 2. The UNIX graphical tools ipload, onperf and xtree only require Motif runtime libraries version 2.3.x. The minimum version is 2.3.4, i.e. motif-devel-2.3.4-14.el7_5.x86_64 3. The Korn shell is required for the Informix server alarmprogram scripts. Install it as /bin/ksh. On Ubuntu Server Edition, pdksh needs to be installed. 4. If a suitable library libaio.so.1 is found, HCL Informix Database Server enables Kernel Asynchronous I/O (KAIO) automatically. Otherwise KAIO is disabled. 5. HCL Informix Database 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 GSKit is not installed, the script $INFORMIXDIR/gskit/installgskit will install GSKit in /usr/local/ibm/gsk8_64 directory on your machine. b. The GSKit installation directory must have 25 MB of free disk space. c. The RPM or Debian Package Manager is required to be installed on the system. 6. The Informix product installer may fail to start correctly. When it aborts the following two messages are displayed: Installer User Interface Mode Not Supported Unable to load and to prepare the installer in console or silent mode. This can happen due to a known problem in the Java Virtual Machine that is internal to the installer. This problem is known as "JDK-8188030 : AWT java apps fail to start when some minimal fonts are present". It may appear when only minimal fonts of the CFF format are installed on the machine. On a Linux system with Intel x86 64-bit architecture, this problem can be worked around by installing an additional font with a format different than CFF. For example fonts from the font package "gnu-free-mono-fonts" are known to allow the Informix product installer to start and operate correctly. This font package can be installed on RedHat distributions by executing the following command as user root: System Configuration ==================== 1. Kernel Parameters The values of the kernel parameters that were used for testing this product are given below. These values might need to be tuned depending on the application and availability of system resources. They can either be dynamically changed in the /proc file system or are defined in the kernel sources and can be changed by rebuilding the kernel. SHMMAX: 4398046511104 SHMMNI: 4096 SHMALL: 4194304 SEMMNI: 4096 SEMMSL: 250 SEMMNS: 32000 SEMOPM: 32 - The value of the kernel parameter "SEMMSL" should be set to at least 100. This is the maximum number of semaphores per set. 2. Location of Shared Memory The ONCONFIG variable SHMBASE is set to the following: SHMBASE 0x44000000L 3. Environment Variables It is recommended that the environment variable INFORMIXSTACKSIZE be set to 128 (the default is 64) if the application involves operations which would require the HCL Informix Database Server to perform recursive database tasks (for example, cascading deletes). Feature Notes (alphabetized by feature) ============= 1. High Performance Loader User-defined conversion routines must be provided in a dynamic, shared 64-bit 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". The following two environment variables are required to be set as: PLOAD_SHMBASE=0x000004000000000 IFX_XFER_SHMBASE=0x000005000000000 Onpload will use shared memory during its execution. It will allocate memory beyond the address for the server, leaving room for server shared memory expansion. 2. IPv6 Support The Informix database server supports Internet Protocol Version 6 (128 Bit Internet Addresses) as well as IPv4 (32 Bit Addresses). In order for the machine name that is specified in the SQLHOSTS file to resolve to the correct IP address, the name services files on the operating system must be configured correctly. If the machine has an IPv6 address configured, and the listener thread is bound to an IPv6 address, then the name service switch files /etc/nsswitch.conf must be configured to fetch an IPv6 address. Also any local machine settings must be set correctly in the /etc/hosts file. For compatibility with earlier version of Informix client and server products, assign each host name 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 the IPv4 address, then an explicit IPv4 address needs to be put in the host name field of SQLHOSTS file. Client applications should also use the same setting. 3. J/Foundation (Java in the Server): The IBM Runtime Environment, Java Technology Edition, Version 8.0 release is installed in $INFORMIXDIR/extend/krakatoa/jre and should be used with the J/Foundation component. A Java user-defined routine (UDR) runs in a Java virtual processor. Use the VPCLASS configuration parameter to specify the number of virtual processors for the server. You configure Java virtual processors in the "Java configuration parameters" section of the onconfig configuration file. The default onconfig.std file is in the $INFORMIXDIR/etc directory. To develop Java UDRs for the server on this platform, use the 64-bit IBM SDK, Java Technology Edition, Version 8 or an earlier version according to Java compatibility guidelines. Java SDK 8 contains the latest virtual machine technology from IBM and can be downloaded from http://www.ibm.com/java/jdk/. 4. Kernel Asynchronous I/O (KAIO) KAIO is enabled by default on this platform. It can be disabled by setting the environment variable KAIOOFF=1 in the environment of the process that starting the server. When using KAIO, it is recommended to run poll threads on separate VPs by specifying NET as VP class in the NETTYPE onconfig parameter, e.g. NETTYPE ipcshm,...,...,NET or NETTYPE soctcp,...,...,NET On Linux, there is a system wide limit of the maximum number of parallel KAIO requests. The file /proc/sys/fs/aio-max-nr is containing this value. It can be increased by the Linux system administrator, e.g. by # echo new_value > /proc/sys/fs/aio-max-nr The current number of allocated requests of all OS processes is visible in /proc/sys/fs/aio-nr. By default, HCL Informix Database Server is allocating half of the maximum number of requests, and assigns them equally to the number of configured CPU VPs. The number of requests allocated per CPU VP can be controlled by the environment variable KAIOON, by setting it to the required value before starting the server. The minimum value for KAIOON is 100. If Linux is about to run out of KAIO resources, e.g. when dynamically adding many CPU VPs, warnings will be printed to the online.log file. In this case, the Linux system administrator should add KAIO resources as described above. 5. Large Memory Addressability (LMA) HCL Informix LMA provides the ability to support system configurations with greater than 4GB of RAM. Most UNIX systems are limited to 4GB of RAM based on the memory addressing limitations of 32-bit architectures. The values for the following ONCONFIG parameters are increased from 32-bit to 64-bit platform by LMA support: - The maximum number of buffers in BUFFERPOOL is 2147483647. - The maximum of LRU queues for lrus field in BUFFERPOOL is 512. - The DS_TOTAL_MEMORY, which is the total memory available for decision support memory, is only limited by the amount of virtual memory available. The sort memory comes out of the DS_TOTAL_MEMORY memory and hence there is no explicit limit on the amount of sort memory. - The read ahead parameter RA_PAGES is only limited by the number of buffers and therefore can be any value less than 2147483647. The "chunk" write algorithm is not dependent on the amount of buffers or shared memory and can write as many pages in a single I/O as possible. - The maximum size of any shared memory segment is 4398046511104 bytes. - The value for SHMADD is 4294967296 kilobytes. Refer to HCL Informix Administrator's Reference manual for the information about the related configuration parameters setting. 6. Locking large pages in memory The Informix database server can use large pages in memory when queries require more memory. (On Linux operating systems, large pages are called huge pages.) However, after you initialize Informix on Linux operating systems, the database server is unable to lock large pages in memory when queries require more memory. If you want to take advantage of the large-page support, you must use the onmode utility to add memory segments, and then run the queries. 7. Network Protocols The following protocols and interfaces are supported on this platform: SOCKETS using TCP/IP IPC using stream pipe (implemented using UNIX Domain Sockets) To use SOCKETS with TCP/IP: a. The NETTYPE entry 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 the database Server, the NETTYPE entry in the ONCONFIG file and the protocal value in the sqlhosts file entry must contain "drsoctcp" If a CLI or JCC client wants to connect to the database server through DRDA while supporting SQLI connections, you must add a DBSERVERALIASES entry to the ONCONFIG file that corresponds to the sqlhosts file entry. To use IPC (interprocess communication) with stream pipe: a. The NETTYPE entry 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. To disable fast poll, set the FASTPOLL parameter to 0 in the ONCONFIG file. By default the fast poll is enabled (value is 1). Remote 32-bit or 64-bit applications and tools (example: ESQL/C, 4GL, ISQL) can only connect to the HCL Informix Database Server using the TCP/IP protocol. Local 32-bit applications and tools can connect to the 64-bit server using either the TCP/IP sockets or the IPC stream pipe protocols. The protocol for supporting IBM Informix MaxConnect on this platform is "onsocimc". 8. Online Backup and Restore (ON-Bar) ON-Bar uses the XBSA interface. 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 the functions, set the BAR_BSALIB_PATH parameter in $INFORMIXDIR/etc/$ONCONFIG to the full pathname of the library. This shared library must be compiled in 64-bit mode. Using $INFORMIXDIR/lib/ibsad001.so as a symbolic link to the library is deprecated and shall be discontinued. Informix Interface for Tivoli Storage Manager (TSM) is supported on this platform. The interface is built with TSM API version 5.3.2. 9. OnSNMP The SNMP agent for OnSNMP is based on SNMP Research (SNMPR). 10. Pluggable Authentication Module (PAM) PAM functionality is supported on Linux operating systems. PAM requires the libpam.so library that is supplied by the Operating System vendor. Use of PAM can be enabled or disabled by the system administrator. By default, the Informix server will use the traditional authentication mechanism to avoid changes for the users. The PAM modules are usually located in /lib64/security. The PAM services are defined in /etc/pam.d. 11. Processor Affinity The processor affinity feature, which allows the pinning of a CPU virtual processor to a physical processor in a multi-CPU configuration, is supported on this platform. 12. Raw Character Devices Some Linux distributions support binding a raw character device to a block device. Any block device may be used. HCL Informix Database Server supports using raw character devices. 13. Secure Sockets Layer HCL Informix Database Server uses the libraries and utilities provided by the IBM Global Security Kit (GSKit) for Secure Sockets Layer (SSL) communication. a. Before uninstalling GSKit, verify that it is not needed on your system. It is possible that software other than Informix Database Server requires GSKit. Uninstall by identifying and removing GSKit packages using the command-line interface: Run rpm command with the -qa option to obtain a list of installed GSKit packages with their exact names. For example: rpm -qa | grep gsk As root user run the rpm command to remove each package as needed. For example: rpm -ev gskssl64-22.214.171.124 gskcrypt64-126.96.36.199 Run dpkg command with the -l option to obtain a list of installed GSKit Debian packages with their exact names. For example: dpkg -l | grep gsk As root user run the dpkg command to remove each package as needed. For example: dpkg -r gskssl64 gskcrypt64 b. 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. 14. Simple Password Communications Support Module The name of the HCL Informix shared library for Simple Password CSM on Linux is libixspw.so. Features not supported ====================== 1. Rolling upgrades to IDS version 14.10.xC2 are not supported. Rolling upgrades are not supported in IDS version 14.10.xC2. Migration to this version from a previous version requires changes to disk structures, and the conversion process is incompatible with a rolling upgrade. When upgrading HDR and RSS secondary servers to version 14.10.xC2, you must follow the steps listed in the on-line documentation under "Migrating an offline cluster to a new major version." (C) Copyright IBM Corp. 2002, 2017 (C) Copyright HCL Technologies Ltd. 2017, 2021. All Rights Reserved.