System Startup, Configuration, and Shutdown Reference Manual (32650-90892)

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logging 1) The process of recording all system modifications to a tape or disk file for the
purpose of recovery or accountability. If the system fails, the log file can be used to restore
the system to its state prior to the failure. 2) The process used by DBCore to record the
activity of a DBEnvironment to enable either rollback or rollforward recovery if necessary.
logging shutdown A shutdown marking the end of the logging cycle. In most cases, it is
performed just prior to either system or database backup.
logical device (LDEV) A disk file, a set of disk files, or a physical device associated with
a data stream between a host and a remote system.
logical device number A number assigned to all hardware components of a computer
system and used for identification purposes.
logoff A method of terminating a session. To log off the system, enter the BYE or EXIT
command.
logon A method of initiating a session. To log on to MPE/iX, enter the HELLO command
and a valid user and account name, plus a group name if necessary, and any required
passwords.
logon group The group specified when logging on using the HELLO command. The syntax
is
username.accountname, groupname . Once the desired group is accessed, resident files
can be referred to without fully qualifying them.
logon identity A security device used to verify users to the system. A logon identity
includes a valid user name and account name in the form user.account.
logon prompt A system prompt that indicates the computer is ready to initiate a session.
logon session An identification device used when logging on. The correct syntax is
sessionname,username.accountname .
master volume The only volume needed to define a volume set. It contains the
configuration data, the root directory, a free space map, file label table, and a volume label
with a unique volume set ID for the volume set.
member volume A volume containing a volume label indicating that it belongs to a
volume set. It may be used by one or more volume classes.
memory error logging A facility that records all memory errors. It begins automatically
when the system is initialized.
memory mapped I/O A configuration in which each device or I/O interface card is
assigned a set of memory locations, or memory mapped I/O registers.
menu A display on the terminal screen showing the options available within a program.
Many application programs use menus to show the options a user can select.
MPE/iX Multi-Programming Executive with integrated POSIX. The operating system for