Sun Global Glossary

“label” to “LWP”

label

(1) (n.) Information that is written by the format program starting at cylinder 0 of a disk. The disk label describes the size and boundaries of the disk's partitions and its disk type.

(2) (n.) The name of a storage volume for which a mass storage device checks.

(3) (n.) The static text that is displayed in the interface. For example, a label might identify a group of checkboxes. (The text that accompanies each checkbox within the group, however, is specified in the individual checkbox component and is therefore not considered a label.) In the JavaTM look and feel, labels are created using the JLabel component.

landscape

(adj.) Characteristic of the orientation of a page or screen image that is wider than it is tall. Contrast with portrait. See also aspect ratio.

latency

(n.) The time lapse between an SBus master's request of the bus and the completed transfer.

layer

(1) (n.) In a graphical user interface, the points where windows and icons overlap one another.

(2) (n.) One of a set of services, functions, and protocols that spans all open systems.

lexical analysis

(n.) The process by which a stream of characters (often from a source program) is rearranged into elementary words and symbols, called tokens. The tokens can include the reserved words of a programming language, its identifiers and constants, and special symbols such as =, :=, and ;.

library routines

(n.) A series of SunOSTM functions that can be called by user programs written in C and other compatible programming languages.

lightweight process

(n.) (LWP) A class of processes that share resources with each other and therefore use fewer resources than ordinary processes.

line buffering

(n.) The buffering of output line-by-line.

line discipline

(n.) A STREAMS module that performs termio(7) canonical and non-canonical processing. It shares some termio(7) processing with a driver in a STREAMS terminal subsystem.

line editor

(n.) An editor that works on a line as the basic unit. Generally, you identify the line to change and then indicate the change desired. Contrast with visual editor.

line pattern object

(n.) In the XGLTM library, an object that defines line style patterns; used when rendering vectors, curves, and edges.

link

(1) (n.) An entry in a directory file that links a user-assigned name for a file to the system's identification number for that file.

(2) (n.) A file name the user gives to a file. See also hard link, symbolic link.

(3) (n.) In Point-to-Point Protocol (PPP), the communications connection that is negotiated and established between two peers. SolarisTM PPP 4.0 supports two types of links, dial up and leased line.

(4) (v.) To join data or compiled modules to form an executable program.

link editing

(n.) The process in which a symbol referenced in one module of a program is connected with its definition in another. In the C compiler, programs are linked statically, when an executable is created, or dynamically, when it is run.

linker

(n.) A module that builds an executable, complete program from component machine code modules. The JavaTM linker creates a runnable program from compiled classes. See also interpreter, runtime system.

list

(n.) A set of choices from which the user can select one or more items. Items in a list can be text, graphics, or both. In the JavaTM look and feel, lists are created using the JList component. Also called selection list. See also combo box.

literal

(1) (n.) A word or symbol in a program expressed as itself rather than as a reference to data.

(2) (n.) The basic representation of any integer, floating point, or character value. For example, 3.0 is a single-precision, floating-point literal, and “a” is a character literal.

loadable kernel module

(n.) The software used to enhance the system kernel.

load-balancing policy

(n.) Applies only to scalable services. The preferred way in which an application request load is distributed across nodes.

loading

(n.) The process of putting the machine-language instructions of a program into memory.

local

(adj.) Characteristic of having limited scope. Contrast with global.

local disk

(n.) A disk that is physically private to a particular cluster node.

local file

(n.) A file that contains information specific to the machine where it resides. When you use network information service (NIS), the local file is checked first before a corresponding global file is checked.

local host

(n.) The central processing unit (CPU) or computer on which a software application is running; the workstation. See also mail host, relay host.

locale

(n.) A geographic or political region or community that shares the same language, customs, or cultural conventions (English for the U.S. is en_US, and English for the U.K. is en_UK).

localization

(n.) The development process that customizes software and documentation for use in a specific country or language environment. See also internationalization.

local variable

(n.) A data item known within a block, but inaccessible to code outside the block. For example, any variable defined within a method is a local variable and cannot be used outside the method.

locked file

(1) (n.) A file that is in use.

(2) (n.) A file that cannot be changed because of its usage.

locking

(n.) In a relational database, the guarantee of read consistency by giving access to data only one process at a time; other processes must wait for access to the database.

LOFS

See loopback file system.

logical disk

(n.) A section of a formatted disk allocated by the software. Also called a partition.

logical-hostname resource

(n.) A resource that contains a collection of logical hostnames that represent network addresses. Logical-hostname resources can only be mastered by one node at a time.

logical network interface

(n.) In the Internet architecture, a host can have one or more IP addresses. SunTM Cluster software configures additional logical network interfaces to establish a mapping between several logical network interfaces and a single physical network interface. Each logical network interface has a single IP address. This mapping enables a single physical network interface to respond to multiple IP addresses. If a failover or switchover occurs, this mapping enables the IP address to move from one cluster member to the other without requiring additional hardware interfaces.

login

(n.) The process of gaining access to a system.

log in

(v.) To supply a user name and password to gain access to a system or desktop session.

login directory

(n.) The directory that you work in after logging in. Usually, the home directory.

login name

(n.) The name the computer system checks against to identify the user.

login prompt

(n.) The string of characters that the system displays to let you know that it is ready to accept your user name.

login shell

(n.) The name of the default shell that you use when you log in.

logout

(n.) The termination of a desktop session.

log out

(v.) To terminate or end access to a system or desktop session.

look and feel

(n.) The appearance and behavior of a complete set of graphical user interface components. See also JavaTM look and feel.

look-up table

(n.) See color map.

loopback file system

(LOFS) (n.) A file system type that lets the user create a new virtual file system. The user can access files by using an alternative path name. An example is the creation of a loopback mount of / onto /tmp/newroot. The entire file system hierarchy looks like it is duplicated under /tmp/newroot, including any file systems mounted from NFS servers. All files are accessible either with a path name that starts from /, or with a path name that starts from /tmp/newroot.

lossless compression

(n.) The compression of data that guarantees the original data can be restored exactly. This type of compression typically leads to compression ratios of about three to one. Some compression techniques, such as JPEG, combine lossy compression and lossless compression algorithms.

lossy compression

(n.) A type of compression that results in the loss of some of the original data. Lossy compression trades the potential for the loss of some image quality for the opportunity for greater compression. Whereas lossless compression results in a compression ratio of about 2:1, lossy compression of video data can lead to ratios of between 10:1 and 50:1 without visibly degrading image quality. JPEG and MPEG are examples of lossy compression techniques.

lower Stream

(n.) A Stream connected below a multiplexer pseudo-device driver by means of an I_LINK or I_PLINK ioctl. The far end of a lower Stream terminates at a device driver or another multiplexer driver.

lpvi

(1) (n.) The video port on the SPARCprinterTM SBus printer card.

(2) (n.) The device driver that controls the video port on the SPARCprinter SBus printer card.

LUN

(n.) (logical unit number) See major/minor device numbers.

LWP

See lightweight process.