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 relative files, the logical order corresponds to the physical order of the records in the file. For indexed files, the logical order is based on the order of the keys in the index of the file.
logical output device
For line devices, the combination of a physical output device and such logical variables as page size and number of lines per vertical inch. A specification of 1403W6 is an example of a logical output device.
- In the IMS message format service, a user-defined group of related message segment and field definitions.
- The defined presentation space on the physical form. All the text and images in the print data must fit within the boundaries of the logical page, which has specified characteristics, such as size, shape, orientation, and offset.
- In COBOL, a conceptual entity consisting of the top margin, the page body, and the bottom margin.
logical page list (LPL)
A list of pages that are in error and that cannot be referenced by applications until the pages are recovered. These pages are in logical error even though the actual media (coupling facility or DASD) might not contain any errors. Usually, a connection to the media has been lost.
logical page origin
The point on the logical page from which positions of images, graphics, page overlays, and text with 0-degree inline direction are measured. See also media origin.
In MFS, the means by which output message segments are grouped for formatting. See also operator logical paging.
- In a partitioned database environment, a database partition server on a processor that has more than one database partition server assigned to it.
- One or more virtualized images of a hardware computing system that can include shared and dedicated resources assigned from the pool of resources available on a physical server. Each image appears to the operating system running within it to be a unique instance of a physical server. See also dynamic LPAR, path group, virtual server, virtualization.
- A set of key or RID pairs in a nonpartitioning index that is associated with a p