Cloud Computing Glossary

A B C D E F G H I L M N O P R S U V W
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S

SLA
Service Level Agreement (SLA). An SLA is contract between a provider and a consumer that specifies consumer requirements and the provider’s commitment to them. Typically an SLA includes items such as uptime, privacy, security and backup procedures.
Subscription based pricing model
A pricing model that lets customers pay a fee to use the service for a particular time period, often used for SaaS services See also: Consumption based pricing model

U

Utility computing
Online computing or storage sold as a metered commercial service in a way similar to a public utility

V

Vendor lock-in
Dependency on the particular cloud vendor and difficulty moving from one cloud vendor to another due to lack of standardized protocols, APIs, data structures (schema), and service models.
Vertical cloud
A cloud computing environment that is optimized for use in a particular industry, such as health care or financial services.
Virtual machine (VM)
A file (typically called an image) that, when executed, looks to the user like an actual machine. Infrastructure as a Service is often provided as a VM image that can be started or stopped as needed. Changes made to the VM while it is running can be…
Virtual private data center
Resources grouped according to specific business objectives.
VPC
Virtual private cloud — A private cloud that exists within a shared or public cloud, e.g., the Amazon VPC that allows Amazon EC2 to connect to legacy infrastructure on an IPsec VPN.

W

Windows Azure
Microsoft cloud services that provide the platform as a service (see PaaS), allowing developers to create cloud applications and services. See also: Azure
Windows Live Services
Microsoft’s cloud-based consumer applications, which include: Windows Live Mail, Windows Live Photo Gallery, Windows Live Calendar, Windows Live Events, Windows Live Skydrive, Windows Live Spaces, Windows Live Messenger, Windows Live Writer, and…
Windows Live Services
Microsoft’s cloud-based consumer applications, which include Windows Live Mail, Windows Live Photo Gallery, Windows Live Calendar, Windows Live Events, Windows Live Skydrive, Windows Live Spaces, Windows Live Messenger, Windows Live Writer, and…