lock

Related Terms

(1) To make a file or other piece of data inaccessible. File locking is a critical component of all multi-user computer systems, including local-area networks. When users share files, the operating system must ensure that two or more users do not attempt to modify the same file simultaneously. It does this by locking the file as soon as the first user opens it. All subsequent users may read the file, but they cannot write to it until the first user is finished.

In addition to file locking, many database management systems support record locking, in which a single record, rather than an entire file, is locked. This enables different users to access different records within the same file without interfering with one another.

(2) In Macintosh environments, locking a diskette means write-protecting it.

PREVIOUS
LocalTalk

NEXT
lock-in

WEBOPEDIA NEWS

Stay up to date on the latest developments in Internet terminology with a free newsletter from Webopedia. Join to subscribe now.

Texting & Chat Abbreviations

From A3 to ZZZ we list 1,559 text message and online chat abbreviations to help you translate and understand today's texting lingo. Includes Top... Read More »

Huge List of Computer Certifications

Have you heard about a computer certification program but can't figure out if it's right for you? Use this handy list to help you decide. Read More »

Computer Architecture Study Guide

Computer architecture provides an introduction to system design basics for most computer science students. Read More »

Network Fundamentals Study Guide

Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »

The Five Generations of Computers

Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use... Read More »