Accounting

MPE/iX allows system managers to limit the amount of disk space that a user may be allocated. Disk space limitations can only be placed on MPE/iX accounts and groups. However, a limit placed on an account or group is also imposed on all hierarchical directories and files created at all levels beneath that account or group.

Users may create files outside their logon account if granted the proper access to do so. Disk usage is still accumulated to the parent account or group, regardless of who creates the file.

Users can use chown() in the MPE/iX shell to change the group ID of files they created outside their logon accounts to their logon account's group ID. This puts the file in the administrative domain of the user's account manager rather than in the domain of the account manager for the account in which the file is located. The disk space for the file accrues to the account in which it resides. Account managers may need to cooperate with each other or with the system administrator to manage disk space when files are being created across account boundaries. See Chapter 9 for additional information on user identification and security.

No accounting limits exist for files or directories that don't reside below MPE groups or accounts. Also, because the REPORT command does not show disk usage outside of the MPE account structure, you need to use the DISKUSE command to do so.

	NOTE: It is suggested that access to root and directories under root be restricted.