Cloud services are emerging at a high rate in the market. Roughly there are 250+ companies using cloud services. Cloud based services can be broadly divided into following 3 *aaS or 3 layers of Cloud Stack.
- Infrastructure-as-a-Service (IaaS)
- Data-as-a-Service(DaaS) is a subset of IaaS.
- Platform-as-a-Service (PaaS)
- Software-as-a-Service (SaaS)
LaaS :- All about hardware, data storage, networking and bandwidth i.e. Server, Routers, Switches etc. Amazon & Rackspace are good examples.
PaaS :- OS + Application Server Stack like .Net framework, VS.Net, SQL Server etc. Best example of PaaS, Microsoft’s Azure & Google’s AppEngine.
SaaS :- Simply order an application & start consuming in minutes. Saleforce.com is the pioneer in this category.
- Amazon :-Specialized in IaaS. It offers through Amazon Web Services (AWS): Amazon Elastic Compute Cloud (EC2), Amazon SimpleDB, Amazon CloudFront, Amazon SQS. It has more than 82 billion objects stored in Amazon S3 (Simple Storage Service).
- Google :- Specialized in PaaS & SaaS. As SaaS it offers Google Apps: a web-based communication, collaboration & security apps which includes, Gmail, Google Calendar, Google Talk, Google Docs & Google Sites. 15 Sep 2009, Google announced that it will provide GovCloud, which will host Google Apps in a separate data environment with enhanced encryption for meeting state and government security standards.
- VMware :- It offers vCloud: Run, secure and manage applications in the private cloud or have them collaborated on-demand to partner-hosted public clouds. vCloud is giving a tough competition to more established Amazon’s AWS.
- RackSpace :- The company specializes in IaaS. It gives Rackspace Cloud, cloud services are: Cloud Sites, Cloud Servers, Cloud Files.
- Microsoft :- Specialized in PaaS. It offers Azure, a Windows-as-a-service platform consisting of the operating system and developer services which could be used to build and enhance Web-hosted applications. Azure is available for VS 2008 via Web Platform Installer. Visual Studio 2010 Beta 2 has all the features you need to code, debug, and deploy your cloud service.
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