IT Glossary & Dictionary

An open-source service mesh that provides traffic management, security, and observability for microservices on Kubernetes.

An open-source automation server for building, testing, and deploying software through configurable CI/CD pipelines.

An SQL operation that combines rows from two or more tables based on a related column between them.

A command-line tool for querying and viewing logs collected by systemd's journal logging system.

The systemd journal daemon that collects and stores log data from services, the kernel, and boot messages in a structured binary format.

JavaScript Object Notation — a lightweight data interchange format that is easy for humans to read and machines to parse.

PostgreSQL's binary JSON data type that stores JSON documents with indexing, querying, and manipulation capabilities.

A vocabulary for validating the structure and content of JSON data, ensuring API requests and responses conform to expected formats.

A compact, self-contained token format used for securely transmitting information between parties as a JSON object.

The core component of an operating system that manages hardware resources and provides services to software.

An open-source container orchestration platform that automates deploying, scaling, and managing containerized applications.

A Kubernetes object that stores non-sensitive configuration data as key-value pairs, injected into pods as environment variables or files.

A virtual cluster within a Kubernetes cluster that provides scope for names and enables resource isolation between teams or environments.

The smallest deployable unit in Kubernetes, consisting of one or more containers that share storage, network, and lifecycle.

A Kubernetes object for storing sensitive data like passwords, tokens, and certificates, with base64 encoding and optional encryption at rest.

An abstraction that provides a stable network endpoint for accessing a group of Pods, handling load balancing and service discovery.

An anonymous, single-expression function defined inline using the lambda keyword.

An AWS serverless compute service that runs code in response to events without provisioning or managing servers.

The time delay between sending a request and receiving a response, measured in milliseconds.

A technique that delays loading non-critical resources until they are needed, improving initial page load performance.

A linear data structure where elements are stored in nodes, each containing data and a pointer to the next node in the sequence.

A software-based network switch in the Linux kernel that connects multiple network interfaces at Layer 2, enabling VM and container networking.

A piece of code that can be loaded into the kernel at runtime to extend functionality without rebooting, such as device drivers and filesystems.

A concise syntax for creating new lists by applying an expression to each item in an existing iterable.

A device or software that distributes network traffic across multiple servers to ensure reliability and performance.

The process of collecting, centralizing, and indexing log data from multiple sources for unified search and analysis.

Python's built-in module for recording diagnostic information with configurable handlers, formatters, and log levels.

A utility that manages automatic rotation, compression, and removal of log files to prevent disk space exhaustion.

A storage management framework that provides flexible disk management through abstract layers of physical and logical volumes.

Special double-underscore methods that define how Python objects behave with built-in operations and functions.

A file containing build rules and commands that automates compilation and common project tasks using the make utility.

An attack where the attacker secretly intercepts and potentially alters communication between two parties who believe they are communicating directly.

A database object that stores the precomputed result of a query, offering faster reads at the cost of periodic refresh.

A comprehensive plotting library for creating static, animated, and interactive visualizations in Python.

An optimization technique that caches function results for given inputs, avoiding redundant computations for repeated calls.

A communication mechanism that enables asynchronous message passing between services, decoupling producers from consumers.

HTML elements in the page head that provide metadata about the document for browsers, search engines, and social media platforms.

An architectural style where an application is composed of small, independent services that communicate over APIs.

Software that sits between the request and response in a web application, performing processing like authentication or logging.

A version-controlled change to a database schema that can be applied and reversed systematically.

A Python file containing definitions and statements that can be imported and reused in other Python programs.

The practice of collecting, analyzing, and alerting on system metrics and logs to ensure application health and performance.

A directory in the filesystem where a storage device or partition is attached and made accessible.

The maximum size of a data packet that can be transmitted over a network without fragmentation.

A network communication method that sends data to multiple recipients simultaneously without duplicating packets for each recipient.

A strategy of using services from multiple cloud providers to avoid vendor lock-in and leverage best-of-breed capabilities.

A technique where the database maintains multiple versions of data to allow concurrent reads and writes without locking.

An architectural pattern that separates an application into three components: data (Model), interface (View), and logic (Controller).