Public Clouds

What are these?

The National Institute of Standards and Technology (NIST) defines 3 cloud computing service models:

1. Infrastructure as a Service (IaaS): Capability to provision processing, storage, networks, and other fundamental computing resources
2. Software as a Service (SaaS): Capability to use the provider's applications running on a cloud infrastructure
3. Platform as a Service(PaaS): Capability to deploy consumer-created or acquired applications created using programming languages and tools supported by the provider

Each of the cloud services shown on this screen falls into one of these service models:

IaaS

• On-demand self-service: The consumer alone can request computing resources which are automatically provisioned without any human interaction
• Storage: Upload and manage files in a web accessible storage system
• Content Delivery: Distribute content over the Internet using a provider's route optimized network of geographically disperse edge servers

SaaS

• Databases: Store application data in a provider's fully managed database system
• Messaging Queues: Use a provider's fully managed messaging system to send and receive application messages using the Internet

PaaS

• Platforms: Create and deploy Internet software using a provider's fully managed application deployment platform

http://csrc.nist.gov/groups/SNS/cloud-computing/

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What is cloud computing?

The National Institute of Standards and Technology (NIST) defines cloud computing as: "A model for enabling convenient, on-demand access to a shared pool of configuration computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction." Our definitions for the 5 essential characteristics of cloud computing defined by NIST are:

• On-demand self-service: The consumer alone can request computing resources which are automatically provisioned without any human interaction
• Broad network access: APIs and management tools are provided by the vendor allowing computing resources to be requested over the Internet
• Resource pooling: Computing resources are pooled to service multiple consumers using a multi-tenant model, with resources dynamically assigned according to consumer demand
• Rapid elasticity: To the customer, compute capabilities appear unlimited and can be rapidly and elastically provisioned both scaling up and back down per customer need
• Measured service: Use of compute resources is monitored and tracked by the provider. Customers are billed based on a utility consumption model. There are no setup fees or contracts

http://csrc.nist.gov/groups/SNS/cloud-computing/

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Reviews

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