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Glossary

Cloud Computing Glossary

Your comprehensive guide to cloud infrastructure, DevOps, and platform engineering terminology.

A

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Autoscaling

Autoscaling automatically adjusts compute resources in response to real-time demand, adding capacity during traffic spikes and removing it when demand drops.

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C

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Compute

Compute is the processing power and resources used to run applications and workloads in a cloud environment, consisting of CPU cycles, memory, and other resources that execute code and handle data.

Compute
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H

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Hypervisor

A hypervisor is software that creates and manages virtual machines by allowing multiple operating systems to share a single physical server's hardware resources.

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I

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Image

An image is a template file that contains a pre-configured operating system, software, and settings used to create instances in cloud hosting. It acts as a blueprint that determines what your virtual machine will run when it starts.

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Instance

An instance is a virtual machine running on a cloud provider's infrastructure with its own operating system, CPU, memory, and storage that you can create, configure, and manage on demand.

Compute
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Instance Lifecycle

Instance lifecycle refers to the sequence of states and transitions a virtual machine goes through from the moment it is created until it is permanently deleted, including active, stopped, paused, suspended, shelved, and error states.

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N

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Nova

Nova is the OpenStack compute service that manages the lifecycle of virtual machine instances, including creation, scheduling, and termination across a cluster of compute nodes.

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V

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Virtual Machine

A Virtual Machine (VM) is a software-based computer that runs on physical hardware through a hypervisor, providing an isolated computing environment with its own operating system, CPU allocation, memory, and storage.

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