User and group name length limit
You can configure and retrieve the user and group name length limit.
The user and group name length limit parameter default value is 9 characters. For AIX® 5.3 and later, you can increase the user and group name length limit from 9 characters to 256 characters. Because the user and group name length limit parameter includes the terminating NULL character, the actual valid name lengths are from 8 characters to 255 characters.
The user and group name length
limit is specified with the v_max_logname system configuration
parameter for the sys0 device. You can change or retrieve
the v_max_logname parameter value from the kernel or
ODM database. The parameter value in the kernel is the value the system uses
while running. The parameter value in the ODM database is the value the system
uses after the next restart.