This file type is compatible with NCSA servers and is ideal for holding a small number of users that does not change very often. Because it is read into the memory of each request processor during server startup and reconfiguration, it is not good for files containing a large number of users.
This file type is ideal for large numbers of users and for cases where the list of users changes often. This file type is not read into memory by each request processor, conserving system memory. There is a small additional performance penalty to pay for each request that is authenticated with this type of file because the server needs to access the database file for each request.
In this mode, the server converts all passwords to upper case and to a common CCSID before hashing them with the RSA Data Security, Inc. MD5 Message-Digest Algorithm. The conversion to upper case allows the server to match passwords in a case-insensitive way, which is in line with general AS/400 operation. The conversion to a common CCSID allows users with different CCSIDs to manage the same user file.
In this mode, the server does no conversion before hashing passwords. This is the method used in versions prior to 1.3. If you have any passwords that were created in this mode, or with an older version of the server, you must either continue to use this mode, or change to the new mode and re-enter the old passwords.