What is Cloud?

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What is cloud?

Computing as a service over the Internet

Cloud computing, often referred to as simply “the cloud,” is the delivery of on-demand computing resources—everything from applications to data centers—over the Internet on a pay-for-use basis.

 

Elastic resources

Scale up or down quickly and easily to meet demand

 

Pay for use

Metered service so you only pay for what you use

 

Self Service

All the IT resources you need with self-service access

Cloud computing services

 

Software
as a service (SaaS)
 

Cloud-based applications—or software as a service (SaaS)—run on distant computers “in the cloud” that are owned and operated by others and that connect to users’ computers via the Internet and, usually, a web browser.

What are the advantages of SaaS cloud applications?

First, there’s no software to purchase, install, update or maintain, which is handled by the service providers. As well:

IBM’s software-as-a-service portfolio for enterprises includes offerings for social business, business process management (BPM), business analytics, web analytics and more.

 

Platform
as a service (PaaS)
 

Platform as a service provides a cloud-based environment with everything required to support the complete lifecycle of building and delivering web-based (cloud) applications—without the cost and complexity of buying and managing the underlying hardware, software, provisioning and hosting.

With PaaS you can:

IBM’s platform-as-a-service offering, IBM SmartCloud Application Services, enables users to deploy and migrate applications to both public and private clouds.

 

Infrastructure
as a service (IaaS)
 

Infrastructure as a service provides companies with computing resources including servers, networking, storage, and data center space on a pay-per-use basis.

Cloud computing deployment models

 

Public cloud  

Public clouds are owned and operated by companies that use them to offer rapid access to affordable computing resources to other organizations or individuals. With public cloud services, users don’t need to purchase hardware, software or supporting infrastructure, which is owned and managed by providers.

Many businesses are using software-as-a-service (SaaS) delivered from the public cloud for applications ranging from customer resource management (CRM)—like Salesforce.com—to transaction management and data analytics.

Beyond SaaS applications, companies are using other public cloud services, including infrastructure as a service (IaaS) to add more storage or compute services on a moment’s notice, and platform as a service (PaaS) for cloud-based application development and deployment environments.

 

Private cloud 

A private cloud is owned and operated by a single company that controls the way virtualized resources and automated services are customized and used by various lines of business and constituent groups. Private clouds exist to take advantage of many of cloud’s efficiencies, while providing more control of resources and steering clear of multi-tenancy.

Key characteristics of private clouds include:

IBM SmartCloud Foundation is our family of integrated, proven technologies for building secure private and hybrid clouds.

 

Hybrid cloud  

A hybrid cloud uses a private cloud foundation combined with the strategic use of public cloud services. The reality is a private cloud can’t exist in isolation from the rest of a company’s IT resources and the public cloud. Most companies with private clouds will evolve to manage workloads across data centers, private clouds and public clouds—thereby creating hybrid clouds.

Evolving to a hybrid cloud strategy will allow companies to keep critical line of business applications and sensitive data in a traditional data center environment or private cloud, while also taking advantage of public cloud resources like SaaS for the latest applications and IaaS for elastic, economical virtual resources to scale.

The key factor for hybrid cloud success

The ability to efficiently and securely manage the combination of public and private cloud services as a single unified computing environment is the key capability to fully taking advantage of the cloud—and it’s where the IBM SmartCloud excels.

IBM SmartCloud Foundation is IBM’s family of integrated, proven technologies for building secure private and hybrid clouds.

IBM SmartCloud

Rethink IT. Reinvent Business.

IBM SmartCloud is a family of integrated enterprise-class cloud computing technologies and services for securely building and using private, public and hybrid clouds. Built upon open standards combined with deep IBM expertise and best practices, SmartCloud is designed for complex high-performance computing environments. SmartCloud goes beyond securely delivering new cloud efficiencies and cost savings to drive fundamental innovation for lasting marketplace advantage.