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================================= MACHINE SPECIFIC NOTES FOR IBM Informix Database Server 11.70.FC2 PRODUCT RELEASE On Linux Power Series DATE: 15 Mar 2011 ================================= OS Information : Built on Red Hat Enterprise Linux ES release 5.3 (Tikanga). Certified on RHEL 6 and SUSE SLES 11. System Requirements =================== 1. This product was built on Red Hat Enterprise Linux ES release 5.3 for 64-Bit Power Series Architecture with Kernel version 2.6.18 and glibc 2.5.34, using the following compilers: gcc/g++ 4.1.2 20080704 (Red Hat 4.1.2-44) The following packages have to be installed on your Linux system: elfutils-libelf-0.137-3 libaio-0.3.106 libgcc-4.1.2 libstdc++-4.1.2 ncurses-5.5 pam-0.99 This product has been certified on: - Red Hat Enterprise Linux ES release 6.0 (Kernel: 2.6.32, Glibc: 2.12). The following packages have to be installed: libaio-0.3.107 libgcc-4.4.4-13 libstdc++-4.4.4-13 compat-libstdc++-33-3.2.3 ncurses-5.7 pam-1.1.1 - SUSE SLES 11 (Kernel: 2.6.27, Glibc: 2.9). The following packages have to be installed: libaio-0.3.104 libgcc43-4.3.3 libstdc++43-4.3.3 ncurses-utils-5.6 pam-1.0.2 2. The UNIX graphical tools ipload, onperf and xtree only require OpenMotif runtime libraries version 2.3.x. The minimum version is 2.3.1, i.e. openmotif-2.3.1-2.el5. 3. The Korn shell is required for the ISM and Informix server alarmprogram scripts. Install it as /bin/ksh. 4. If a suitable library libaio.so.1 is found, IBM Informix Database Server enables Kernel Asynchronous I/O (KAIO) automatically. Otherwise KAIO is disabled. 5. The High Performance Loader utilities, onpload and onpladm, require a minimum of 35 MB of memory and 70 MB of swap space in order to run. 6. libelf.so should be a valid link on the system. Generally, /usr/lib64/libelf.so is linked to /usr/lib64/libelf.so.1. 7. IBM 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, Informix server will install GSKit in /usr/local/ibm/gsk8_64 directory on your machine. b. The GSKit installation directory must have 30 MB of free disk space. c. The RPM Package Manager is required to be installed on the system. Check the following web site for the latest Linux system requirements for IBM Informix Database Server: http://www-01.ibm.com/support/docview.wss?rs=630&uid=swg27013343 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: 128 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 should be set to the following: SHMBASE 0x100000000 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". 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 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/nsswitch.conf should be configured to fetch IPv6 addresss. 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. 3. 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, IBM 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. 4. Large Memory Addressability (LMA) IBM 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 IBM Informix Administrator's Reference manual for the information about the related configuration parameters setting. 5. MQ Messaging Database Extension The MQ extension provides mechanism for data exchange between Informix server and queues managed by Websphere MQ. Note : MQ extension expects Websphere MQ libraries installed in the default location /opt/mqm. Otherwise create symbolic links from /opt/mqm/lib64 to the 64-bit Websphere MQ libraries. 6. Network Protocols The following protocol(s)/interface(s) are supported besides shared memory 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 Database 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 Informix server 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). Remote 32-bit applications and tools (example: ESQL/C, 4GL, ISQL) can only connect to the IBM 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 used for supporting MaxConnect on this platform is "onsocimc". 7. 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, 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. Informix Interface for Tivoli Storage Manager (TSM) is supported on this platform. The interface is built with TSM API version 5.3.2. 8. Optical The Optical feature has not been tested with the Optical Simulator. The name of IBM Informix shared library for Optical 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. 9. Pluggable Authentication Module (PAM) PAM functionality is supported on Linux 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 Informix server 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. 10. 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. 11. Secure Sockets Layer IBM 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 gskssl64-126.96.36.199 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. 12. Simple Password Communications Support Module The name of the IBM Informix shared library for Simple Password CSM on Linux is libixspw.so. Features not supported ====================== 1. J/Foundation 2. Basic Text Search Database Extension 3. Spatial Database Extension 4. TimeSeries Database Extension 5. Web Feature Service Database Extension 6. XML Publishing 6. Shared Disk Secondary Servers 7. OnSNMP Known Defects ============= Refer to section I in doc/ids_defects_11.70.txt for the information regarding known issues. Defects Fixed in current Release ================================ Refer to section II in doc/ids_defects_11.70.txt for the information regarding defects fixed in this release. (C) Copyright IBM Corp. 2002, 2011