single logical unit (LU). An LVOL typically resides on one or more storage devices.
- A set of logical partitions, each of which is stored on one or more physical partitions from one or more of the physical volumes of a given volume group. A logical volume has a device name (of the form /dev/hdn) and contains a single file system.
- A portion of a physical volume that contains a file system.
- A collection of physical partitions organized into logical partitions, all contained in a single volume group. Logical volumes are expandable and can span several physical volumes in a volume group.
Logical Volume Manager (LVM)
A set of system commands, library routines, and other tools that allow the user to establish and control logical volume (LVOL) storage. The LVM maps data between the logical view of storage space and the physical disk drive module (DDM).
The process of signing on to a given computer system by typing in one's user ID and password. See also concurrent login.
A function in Distributing Computing Environment (DCE) that initializes a user's security environment in DCE. A login facility employs the user's password to authenticate the user to the DCE Security Service and returns authentication information associated with the user.
- A statistical technique for classifying records based on the values of the input fields. Logistic regression is similar to linear regression, but takes a categorical target field instead of a numeric one. See also regression.
- A commonly-used regression analysis that predicts the value of a binomial dependent variable from one or more independent or predictor variables.
A defined role in WebSphere Commerce that manages fulfillment. The logistics manager has access to all operational tasks, including the duties of the pick packer, receiver, and returns administrator. See also pick packer, receiver, returns administrator.
See log stream merge.
See logon mode table.
The name of the CICS system log currently in use. See also exchange log name.
log of logs
A form of user journal containing copies of the tie-up records written to forward recovery logs. It provides a summary of which recoverable Virtual Storage Access Method (VSAM) data sets the Customer Information Control System (CICS) has used, when they were used, and to which log stream the forward-recovery log records were written. The log of logs is written by CICS to provide information to forward recovery programs such as CICS VSAM Recovery (CICSVR).
- To connect to a computer system or network.
- In SNA products, to initiate a session between an application program and a logical unit (LU).
An ETO descriptor that provides information required by IMS to build terminal-related control blocks. See also ETO descriptor.
In VTAM, a subset of session parameters specified in a logon mode table for communication with a logical unit (LU). See also session parameter.
See log recording data set.
- A predefined structure into which the log data is formatted. Records have a specific size and format, and contain a certain set of related information. A log record can be identified by its log sequence number (LSN).
- A set of data that is treated as a single unit in a log file.
- A discrete piece of information that describes an event that occurs in a system. For example, a record of an update to a database performed during a unit of work (UOW) is written after the log tail of the active log.
- An entry in a log view that consists of properties and their values. A log record does not contain instances of other log records but has nested levels of entries or children.
log record sequence number (LRSN)
A unique identifier for a log record that is associated with a data sharing member. DB2 for z/OS uses the LRSN for recovery in the data sharing environment. See also log sequence number.
In an RSR environment, the component of the tracking subsystem that receives log data from active subsystems, stores the data in tracked log data sets, and routes the log records to tracking components.
- See log record identifier.
- In DB2 for Linux, UNIX, and Windows, 