articular partition.
In ESS Copy Services, a relationship between a source logical subsystem and target logical subsystem that is created over a physical path through the interconnection fabric used for Copy Services functions.
- In COBOL, the most inclusive data item. The level number for a logical record is 01.
- A group of logically related fields. Portions of the same logical record may be located in different physical records, and several logical records or parts of several logical records may be located in one physical record.
- In OSI, an abstract resource such as a layer entity. See also physical resource.
- A software construct, such as a lock or a buffer, that is required for the execution of a program and is in limited supply.
- On z/OS, a subsystem that is running DB2 for z/OS.
- In replication, on Linux, UNIX, and Windows, a DB2 database.
- A conceptual storage layout in which an application maps first into logical addresses, which are then mapped into real addresses by control blocks.
- With respect to data, the attributes that describe the data and its usage, as opposed to the physical location of the data. See also physical storage.
- The amount of central storage required by a job or a job step to execute efficiently on a processor.
logical subsystem (LSS)
The logical functions of a storage controller with which one or more host I/O interfaces can access a set of devices. The controller groups the devices according to the addressing mechanisms of the associated I/O interfaces. One or more LSSs exist on a storage controller. In general, the controller associates a given set of devices with only one LSS.
In Q replication, all of the copies of one table that are distributed across servers in bidirectional or peer-to-peer replication. If a user replicates two logical tables, then copies of both tables are distributed across the servers.
- In SWIFT, the logical entity through which users send and receive SWIFT messages. A logical terminal is identified by its LT name.
- A message destination logically associated with a physical terminal or user. An LTERM is represented by a CNT control block. See also remote logical terminal.
logical terminal pool
A user-defined group of logical terminals to be associated with non-VTAM switched communication lines through the /IAM command. Each logical terminal pool consists of one or more logical terminal subpools.
logical terminal subpool
A user-defined group of logical terminals to be associated with non-VTAM switched communication lines through the /IAM command. Each logical terminal pool consists of one or more logical terminal subpools.
In a database, all occurrences of one type of logical child with a common logical parent occurrence. See also physical twins.
- In open systems, a logical disk drive.
- An access point through which a user or application program accesses the SNA network to communicate with another user or application program. See also local logical unit.
- A unit of linear measurement. For example, in Mixed Object Document Content Architecture (MO:DCA) and AFP data streams, the following measurements are used: 1 L-unit = 1/1440 inch, 1 L-unit = 1/240 inch.
- An entity to which Small Computer System Interface (SCSI) commands are addressed, such as a volume or managed disk (MDisk).
- The work that occurs between the start of a transaction and commit or rollback and between subsequent commit and rollback actions. This work defines the set of operations that must be considered part of an integral set.
- The processing that a program performs between synchronization points.
logical unit of work identifier (LUWID)
A name that uniquely identifies a thread within a network. This name consists of a fully qualified logical unit network name, a logical unit of work instance number, and a logical unit of work sequence number.
logical unit of work state (LUW state)
The condition of a logical unit of work (LUW). The LUW state reflects the actions that have been done in that LUW and determines what the next set of actions may be.
- The storage medium associated with a 