Cloud Glossary: Letter Q

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Q

QoS (Quality of Service)

A set of technologies and techniques used to manage network traffic and ensure reliable performance levels.

Queue

A data structure that stores items in a first-in-first-out (FIFO) order, commonly used for asynchronous processing.

Query

A request for information from a database or search system using a specific syntax or language.

Quota

A limit on the amount of resources that can be consumed by users, applications, or services.

Quick Start

Pre-configured templates or guides that help users deploy applications or infrastructure rapidly.

Quorum

The minimum number of nodes required to perform operations in a distributed system to ensure consistency.

Query Cache

A system that stores the results of database queries to improve performance for repeated requests.

Queue Management

The process of organizing, monitoring, and controlling message queues to ensure efficient processing.

Query Optimization

Techniques used to improve the performance of database queries by reducing execution time and resource usage.

Queueing Theory

Mathematical study of waiting lines and the analysis of queues to optimize system performance.

Query String

The part of a URL that contains data to be passed to web applications, typically following a question mark.

Quarantine

A security measure that isolates potentially harmful files, processes, or network traffic for analysis.

Quality Assurance (QA)

The systematic process of ensuring that products and services meet specified requirements and quality standards.

Query Plan

A sequence of steps that a database management system uses to access and retrieve data for a query.

Query Engine

A software component that processes and executes queries against databases or data stores.

Queue Depth

The number of messages waiting to be processed in a queue at any given time.

Quality Gate

A checkpoint in software development that ensures code meets specific quality criteria before proceeding.

Query Federation

The ability to execute queries across multiple data sources as if they were a single database.

Query Language

A specialized programming language designed for managing and retrieving information from databases.

Queue Polling

The process of regularly checking a queue for new messages to process in message-based systems.

Query Result Caching

Storing the results of executed queries to avoid repeated computation for identical requests.

Quasi-Static

Content or configuration that changes infrequently and can be cached for extended periods.

Quiesce

The process of bringing a system to a quiet state by completing ongoing operations and preventing new ones.

Query Timeout

A limit on how long a query can execute before being automatically terminated by the system.

Quota Management

The administration and monitoring of resource limits to ensure fair usage and prevent system overload.

Query Rewriting

The process of transforming queries to improve performance or compatibility with different database systems.

Queue Listener

A component that monitors a queue and processes messages as they arrive in the system.

Quality Metrics

Quantitative measures used to assess the quality of software, systems, or processes.

Query Execution Plan

A detailed blueprint showing how a database engine will execute a specific query.

QEMU (Quick Emulator)

An open-source machine emulator and virtualizer that can run operating systems and programs.

Queue Priority

A mechanism that assigns different levels of importance to messages in a queue for processing order.

Query Performance

The speed and efficiency with which database queries are executed and results are returned.

Quality Control

The operational activities used to fulfill requirements for quality in products and services.

Query Monitoring

The process of tracking and analyzing database query performance and resource usage.

Queue Worker

A background process that continuously monitors and processes messages from a queue system.

Query Builder

A tool or interface that helps users construct database queries without writing raw SQL code.