User Name Mapping Best Practices; Mapping Server "Ls -Al" Command Example - HP ProLiant 300 Series Administration Manual

Figure 77 Mapping server "ls -al" command example
A double translation, as illustrated in Figure 77, is sometimes necessary because some commands return
user ID information. For example, if the NFS request issued was an ls -al command, the return listing
of files contains user information (the user and group that own the file). The ls -al command is a UNIX
command. It returns a long or full listing of all files. Because this information is contained in a Windows
NT Access Control List (ACL), it is not UNIX ready. The ACL information has to be converted back to
UNIX UIDs and GIDs for the UNIX systems to understand and display the user information.
This second translation is not done for commands that do not return user information. For example, if
the NFS request were just to read data from or write data to a file, the second translation would not be
performed because there is no returning user information.

User name mapping best practices

Below is a brief list of suggested practices:
146
Services for NFS/UNIX