IBM eServer p5 and pSeries Administration and Support for AIX 5L V5.3

Short Description
To get the most out of an AIX 5L system, the hardware used is important. It is always possible to add, upgrade, and configure new devices later, but an initial architecture planning step cannot be skipped. For example, a system may require an additional server named the Hardware Management Console (HMC) to provide advanced management functions.

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Content
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AIX 5L Version 5.3 systems can be configured to accommodate user and group names exceeding eight characters. Applications that have not been specifically structured to handle long user and group names and that use older security library interfaces with eight character name limits or depend on user and group names not exceeding eight characters in length may not work correctly on systems that have been enabled for long user and group names. AIX 5L Version 5.3 commands that display user and group names will truncate user and group names to eight characters to accommodate existing use unless command-specific options are utilized to display long user and group names.
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Any 64-bit applications produced using AIX Version 4 will not execute on AIX 5L. These applications need to be recompiled from the source on AIX 5L to execute on this version of AIX. The 64-bit applications produced using AIX 5L on any of the 32-bit or 64-bit processor models will execute without recompilation on the 64-bit processor models. The 32-bit applications produced using AIX 5L on either 32-bit or 64-bit processor models will execute without recompilation on both models.
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