ical link is related to the transactions and terminals that can use that physical link. See also physical link.
- A cluster network or a connection between nodes that allows messages and other information to pass between cluster nodes.
- The logical connection between an application on the S/370 and an application on the workstation.
- The data link control (DLC) LAN sublayer that provides two types of DLC operation for the orderly exchange of information. The first type is connectionless service, which allows information to be sent and received without establishing a link.
- A protocol for data-link-level transmission control. The protocol was developed by the IEEE 802 committee, and is common to all LAN standards.
Logical Link Control protocol (LLC protocol)
In a local area network, the protocol that governs the assembling of transmission frames and their exchange between data stations independently of the Medium Access Control protocol.
logical link control protocol data unit
A unit of information that is exchanged between link stations in different nodes. The LLC protocol data unit contains a destination service access point (DSAP), a source service access point (SSAP), a control field, and user data.
logical lock (L-lock)
The lock type that transactions use to control intra-DB2 and inter-DB2 data concurrency between transactions. See also physical lock.
The process of moving log records into the log buffers. See also physical logging.
logically detached partition
A partition that was successfully processed by the ALTER TABLE statement with the DETACH PARTITION clause, but is not yet a stand-alone table. The partition is still accessible to some queries that began reading the partition before the statement was issued. See also asynchronous partition detach.
logically partitioned mode
A capability provided by the Processor Resource/System Manager (PR/SM) that allows a single processor to run multiple operating systems using separate sets of system resources, or logical partitions. See also basic mode.
logical management operation (LMO)
A generic function that is supported by a set of devices. For example, configuring an IP address on a network interface is a logical management operation supported by all operating systems. Although this is logically the same function, the steps for performing this function on each operating system are different. These steps are supported by provisioning workflows for that operating system. See also logical device operation.
The address space, assigned to a logical partition, that the operating system perceives as its main storage. For a shared memory partition, a subset of the logical memory is backed up by physical main storage, and the contents of the remaining logical memory are kept in secondary storage.
- A collection of formatted output data produced by chaining several smaller pieces of data. A user builds a logical message by issuing a series of BMS SEND commands.
- An input or output message that is in a queue associated with a logical rather than a physical terminal. The message queue can be moved, independent of an application, from device to device.
A set of logical derivations. See also logical derivation.
A mount that attaches a file system to the root directory or to a directory of another file system so that the files and directories on the file system can be referenced. The attached file system can consist of a file or many files and directories.
A name assigned to a device that distinguishes it from all other device instances in the system. It is the name used to refer to a particular device. For example, "tok0" can refer to a token-ring adapter. This is the same as "device name," which is a field in the Customized Devices Object Class.
The space that is used by logical files in a storage pool. This space does not include the unused space created when logical files are deleted from aggregate files, so it might be less than the physical occupancy. See also physical occupancy.
In COBOL, the order in which records are sequentially read from a file. For sequential and rel