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The software is supported on most major platforms, including AIX, HP-UX, Linux, and Solaris. For current information about supported releases:

1. Go to http://techsupport.informationbuilders.com.

   The Information Builders Technical Support home page opens.

2. In the Self-Service section, click Supported Systems/Adapters.

   The Supported Systems and Adapters page opens.

3. Click the link for the release you want.

   The Supported Systems and Adapters page for that release opens.

4. Click the link for your platform.

   The support chart for that platform opens.

In general, the operating system should have the latest cumulative patch levels applied.

Confirm that your installation software is labeled for your operating system level.

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The following are approximate disk space requirements in megabytes. Specific sizes may vary slightly depending on the release being used and the options selected during configuration. The usage numbers do not include space for actual applications, databases, sort space, output preparation, or logs.

Platform	After Installation
AIX	900 MB
HP- UX PA-RISC	1.2 GB
HP-UX IA64 (Integrity)	1.1 GB
Linux for Intel/AMD	800 MB
Linux for pSeries	900 MB
Linux for zSeries	900 MB
Solaris Sparc	900 MB - 1 GB
Solaris x86	900 MB

During installation, the disk space required is approximately 20 megabytes more than double the After Installation size. These numbers do not include space for applications. The ibisamp sample application requires an additional six megabytes.

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Memory and shared memory usage depends on:

• Number of data adapters.
• Type of access performed (for example, joins, large-scale retrieval, and so on).
• Connection queue.

Memory usage differs depending on your implementation of UNIX and your FOCUS load.

The following table shows the approximate memory requirements for installing and running FOCUS.

Platform	Memory Per Session
HP-UX	46 MB
AIX	55 MB
Solaris (Sparc)	145 MB
Solaris (Intel)	82 MB
Linux for Intel/AMD 32b	66 MB
Linux for Intel/AMD 64b	96 MB
Linux for pSeries 64b	200 MB
Linux for zSeries 64b	100 MB
Linux for zSeries 32b	80 MB

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You need one TCP/IP port for the FOCUS SU instance that you configure. By default, the installation procedure uses 8102. If you are installing FOCUS for Distributed Systems on a box that is also running WebFOCUS, you will need to enter a unique port number for the FOCUS SU instance to avoid conflict with WebFOCUS. To change the default port number, enter N when prompted to Proceed with defaults.

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When installing and using FOCUS, you need two types of operating system user IDs:

• FOCUS administrator IDs (iadmin). FOCUS administrators use this ID to install FOCUS. This ID is also used to configure FOCUS.

  The operating system ID you use when installing FOCUS owns the FOCUS files. You can create a new operating system ID to run and own the FOCUS files, or use any ordinary (non-superuser) ID. However, you should not install FOCUS as root. The FOCUS administrator ID should have a Korn, Bourne, or Bash shell as the default logon shell.

  Note that the name iadmin is used to refer to the FOCUS administrator ID and group throughout this manual, but you may use any name for this ID. If you have WebFOCUS installed and already use iadmin for that administrator ID, you can still use iadmin for the FOCUS administrator. However, to avoid confusion, you may prefer to use a new ID for the FOCUS administrator.

  For security purposes, you should not allow users and applications to use the iadmin ID. It should be available only to users who require administrative privileges.

• User and application IDs. When users and applications try to access FOCUS, FOCUS is started with the security set for that user’s ID and group.