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DevOps Terminology: A Glossary

Definitions of common DevOps terms and buzzwords

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Check out our glossary of common DevOps, monitoring and development terms and definitions.


API Response Time

Find out what API response time is and why it matters for user experience. Learn how to check and optimize it if it has an unacceptable score.


Find out what the Linux Audit daemon is and how it works. Short tutorial with the key utilities to know to start tracking suspicious activity and improve security.


Learn what AIOps is and how it works. Discover the key benefits of using artificial intelligence to automate and improve IT operations.

Anomaly Detection

Find out what machine learning is in data science and how it helps improve business operations. Key anomaly detection techniques, use cases and more.


Buffer vs. Cache

Find out what buffer memory is in computer science and discover the main differences between it and cache memory. Buffer vs. Cache tutorial.


Certificate Authority (CA)

Find out what a Certificate Authority is and why you need it. Discover benefits and examples to help you understand how to choose the best certificate authority for your business.

Container Orchestration

Learn what container orchestration is and why we need it. Discover key benefits and the most common tools you can use to efficiently manage containers.


Learn what containers are and how they work. From use cases to benefits, discover everything you need to know to build efficient containerized environments.

Cumulative Layout Shift (CLS)

Cumulative Layout Shift (CLS) is a core Web Vitals metric and it calculates the shifting of elements while the page is being downloaded and rendered.


In computer science, a cache is a storage location used to temporarily store data used by servers, apps, and browsers to speed load times.


DevOps Pipeline

Find out what pipelines are in DevOps and how to build one. A step-by-step guide for absolute beginners.


Find out what the DevSecOps methodology is and how it works. The ultimate guide to benefits and best practices that help improve cyber security.


Learn what Docker is. Basic terms and main benefits explained to understand why you should use containers and how they work.


Learn what the DevOps methodology is and why it's important. A complete overview of the model's basic concepts and processes that help improve operations.

DNS Lookup time

DNS stands for Domain Name System, a server or set of servers that store a record of domain names and their associated IP addresses.


Error Log

Find out what error logs are and why are they useful. Discover what information they contain and what to do to get the most out of them.


First Input Delay (FID)

First Input Delay (FID) is the metric that calculates the time it takes for the browser to respond to the first client request. It’s measured in milliseconds.

Full Stack Observability

Find out what full stack observability is and why your business needs it. Discover how using a full stack observability solution will enhance system performance.


HTTP Requests

An HTTP request is made from a client to a host located on the server in order to receive a resource needed to build the content.


IOPS (Input/Output Operations per Second)

Find out what IOPS (input/output operations per second) is and how to measure it to ensure the performance of your SSD or HDD storage systems.


JVM Heap

Find out what heap space is and what it is used for in Java. Basic concepts to help you better manage JVM memory to avoid leaks and errors.

JVM Threads

Learn what a thread is in Java. Discover the benefits of using JVM threads, how to work with and monitor them to ensure fast and efficient applications.


Kubernetes Replica

Find out what Kubernetes pod replicas are and why they can help you get good performance and reliability at a low cost.


Learn what Kubernetes is and how it works. Key terms and benefits explained in simple words to understand why you should use K8s container orchestration.

Kubernetes QoS

Find out what Quality of Service (QoS) classes are in Kubernetes and how to configure them to reduce the K8s resources waste and avoid performance issues.

Kubernetes Operator

Find out what a Kubernetes Operator is and why you need it. Discover benefits and examples to help you understand how to manage your workloads.

Kubernetes Pod

Find out what a pod in Kubernetes is and how it works. In-depth explanations for everything you need to start working with K8s pods.


Log Rotation

Find out what log rotation is and why it's important. Learn how it works and the best practices to follow for efficient logging operations.

Log File

Find out what log files are and what information they contain.

Largest Contentful Paint (LCP)

Largest Contentful Paint (LCP) is a Core Web Vitals metric that measures how long it takes a website to render the largest part of the content on the screen. In most cases, LCP refers to the content above the fold rather than the entire page.



Learn what a microservices architecture is and its characteristics. Complex overview of the basics from how it works to pros, cons, examples and use cases.

Memory Bottleneck

Find out what a memory bottleneck is and why it occurs. Learn how to find, solve and prevent it to ensure the optimum performance of your system.



Learn what observability is and what it is used for in IT. Discover how organizations can benefit from implementing it in their software development process.

Observability vs. Monitoring

Discover what is the difference between observability and monitoring. In-depth comparison explaining how each tool can help ensure system performance.


Page Load Time

Learn what page load time is and why it's important. Find out how to check and improve it to get an acceptable average score and make websites load faster.


Render time

Render time is the metric that refers to the time it takes for a website or web app to load enough that the user can actually interact with the page.

Response Time

Response time refers to the amount of time it takes for a server to respond to a client's request and is measured in milliseconds.


Service Level Objectives (SLOs)

Find out what an SLO is and how it works. Discover best practices and examples for how to define effective service level objectives.

Service Level Indicators (SLIs)

Find out what an SLI is and how it works. Discover best practices and examples to help you define and implement efficient service level indicators.

SSL Certificate Chain

Learn what an SSL certificate chain is and how it works. Understand the concept of a chain of trust and how it plays a crucial role in verifying the authenticity of websites.

SSL/TLS Handshake

Learn what a SSL/TLS handshake is and how it works. Step-by-step explanation of the process that helps the client and server to communicate with each other.

Structured Logging

Find out what structured logging is and why developers need it. Examples of structured logs and top tools that help leverage them for faster troubleshooting.

SSL Certificate

An SSL certificate is a digital certificate that provides authentication for a website is and is used to ensure internet security by preventing any third party with malicious intent from intercepting, reading, or modifying any information transmitted.

Service Level Agreement (SLA)

Find out what a Service Level Agreement is and why do you need it. Discover key components, common metrics, and best practices to write a successful SLA.

SSL Certificate Expiry

Find out what SSL certificate expiration means and how to fix it. Discover why it happens and how an invalid security certificate affects your website.


The Three Pillars of Observability

Find out what are the three pillars of observability and how they help track system health and performance. Benefits and limitations explained.

Time to First Byte

Find out what Time to First Byte is and how to improve it. Tips to optimize TTFB values to speed up server responsiveness and deliver a better user experience.