examples of platform as a service
IAAS (Infrastructure As A Service) :
Deals with Virtual Machines, Storage (Hard Disks), Servers, Network, Load Balancers etc
A layer on top of IAAS
Runtimes (like java runtimes), Databases (like mySql, Oracle), Web Servers (tomcat etc)
A layer on top on PAAS
Applications like email (Gmail, Yahoo mail etc), Social Networking sites (Facebook etc)
To quickly relate consider the below Google’s offerings:
IAAS : Google Compute Engine (One can develop programs to be run on high performing google’s computing infrastructure)
PAAS : Google App Engine (One can develop applications and let them execute on top of Google app engine which take care of the execution)
SAAS : Gmail, Google+ etc (One can use email services and extend email/google+ based applications to form newer applications)
Cloud computing is dominated by
- Amazon Web Services (AWS),
- Google Compute Engine, Google App Engine
- Microsoft Azure
- There are many small and medium scale cloud operators that include IBM, Oracle etc.
Most of the popularity around these services owe to the reputation of the company and the amount of investments being made by these companies around the cloud space.
Type of Service Wise Popularity
- PAAS (Platform as a Service) is more popular among developers as they can put all their concentration on developing their apps and leave the rest of management and execution to the service provider. Many service providers also offer the flexibility to increase/decrease the CPU power depending upon the traffic loads giving developers cost effective and easy effortless management.
- SAAS (Software as a service) is more popular among with consumers, who bother about using the application such as email, social networking etc
- IAAS (Infrastructure as a service) is more popular among users into research and high computing areas.
SaaS: Software as a Service Cloud application services or “Software as a Service” (SaaS) are probably the most popular form of cloud computing and are easy to use. SaaS uses the Web to deliver applications that are managed by a third-party vendor and whose interface is accessed on the clients’ side. Most SaaS applications can be run directly from a Web browser, without any downloads or installations required. SaaS eliminates the need to install and run applications on individual computers. With SaaS, it’s easy for enterprises to streamline their maintenance and support, because everything can be managed by vendors: applications, runtime, data, middleware, O/S, virtualization, servers, storage, and networking. Gmail is one famous example of an SaaS mail provider.
PaaS: Platform as a Service The most complex of the three, cloud platform services or “Platform as a Service” (PaaS) deliver computational resources through a platform. What developers gain with PaaS is a framework they can build upon to develop or customize applications. PaaS makes the development, testing, and deployment of applications quick, simple, and cost-effective, eliminating the need to buy the underlying layers of hardware and software. One comparison between SaaS vs. PaaS has to do with what aspects must be managed by users, rather than providers: With PaaS, vendors still manage runtime, middleware, O/S, virtualization, servers, storage, and networking, but users manage applications and data.
IaaS: Infrastructure as a Service Cloud infrastructure services, known as “Infrastructure as a Service” (IaaS), deliver computer infrastructure (such as a platform virtualization environment), storage, and networking. Instead of having to purchase software, servers, or network equipment, users can buy these as a fully outsourced service that is usually billed according to the amount of resources consumed. Basically, in exchange for a rental fee, a third party allows you to install a virtual server on their IT infrastructure. Compared to SaaS and PaaS, IaaS users are responsible for managing more: applications, data, runtime, middleware, and O/S. Vendors still manage virtualization, servers, hard drives, storage, and networking. What users gain with IaaS is infrastructure on top of which they can install any required platforms. Users are responsible for updating these if new versions are released.