Cloud Computing: Characteristics, Types-Public, Private & Hybrid Cloud; IaaS, PaaS, FaaS, SaaS YouTube Lecture Handouts Part 2

Doorsteptutor material for competitive exams is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of your exam.

Cloud Computing: Characteristics, Types - Public, Private & Hybrid Cloud; IaaS, PaaS, FaaS, SaaS

Types of Cloud Services

Types of Cloud Services
  • Most cloud computing services fall into four broad categories: infrastructure as a service (IaaS) , platform as a service (PaaS) , serverless and software as a service (SaaS) . These are sometimes called the cloud computing stack because they build on top of one another. Knowing what they are and how they are different makes it easier to accomplish your business goals.
  • Infrastructure as a service (IaaS) : Most basic category of cloud computing services. With IaaS, you rent IT infrastructure — servers and virtual machines (VMs) , storage, networks, operating systems — from a cloud provider on a pay-as-you-go basis.
  • Platform as a service (PaaS) : Platform as a service refers to cloud computing services that supply an on-demand environment for developing, testing, delivering and managing software applications. PaaS is designed to make it easier for developers to quickly create web or mobile apps, without worrying about setting up or managing the underlying infrastructure of servers, storage, network and databases needed for development.
  • Software as a service (SaaS) : Software as a service is a method for delivering software applications over the Internet, on demand and typically on a subscription basis. With SaaS, cloud providers host and manage the software application and underlying infrastructure and handle any maintenance, like software upgrades and security patching. Users connect to the application over the Internet, usually with a web browser on their phone, tablet or PC.
  • FaaS (functions as a service) : Cloud version of serverless computing, adds another layer of abstraction to PaaS, so that developers are completely insulated from everything in the stack below their code. Instead of futzing with virtual servers, containers, and application runtimes, they upload narrowly functional blocks of code, and set them to be triggered by a certain event (such as a form submission or uploaded file) . All the major clouds offer FaaS on top of IaaS: AWS Lambda, Azure Functions, Google Cloud Functions, and IBM OpenWhisk. A special benefit of FaaS applications is that they consume no IaaS resources until an event occurs, reducing pay-per-use fees.
Types of Cloud Services

Public APIs (Application Programming Interfaces)

Similar to SaaS delivers applications to users over the internet, public APIs offer developers application functionality that can be accessed programmatically. For example, in building web applications, developers integrate with social media, developers may call upon APIs maintained by Twitter, Facebook, or LinkedIn.

IPaaS (Integration Platform as a Service) Definition

  • Data integration is a key issue for any sizeable company, but particularly for those that adopt SaaS at scale. iPaaS providers typically offer prebuilt connectors for sharing data among popular SaaS applications and on-premises enterprise applications, though providers may focus more or less on B-to-B and e-commerce integrations, cloud integrations, or traditional SOA-style integrations.
  • iPaaS offerings in the cloud from such providers as Dell Boomi, Informatica, MuleSoft, and SnapLogic also let users implement data mapping, transformations, and workflows as part of the integration-building process.

IDaaS (Identity as a Service) Definition

  • The most difficult security issue related to cloud computing is the management of user identity and its associated rights and permissions across private data centers and pubic cloud sites.
  • IDaaS providers maintain cloud-based user profiles that authenticate users and enable access to resources or applications based on security policies, user groups, and individual privileges. The ability to integrate with various directory services (Active Directory, LDAP, etc.) and provide is essential. Okta is the clear leader in cloud-based IDaaS; CA, Centrify, IBM, Microsoft, Oracle, and Ping provide both on-premises and cloud solutions.

Vertical Clouds

  • Key providers in such industries as financial services, health care, retail, life sciences, and manufacturing provide PaaS clouds to enable customers to build vertical applications that tap into industry-specific, API-accessible services.
  • Vertical clouds can dramatically reduce the time to market for vertical applications and accelerate domain-specific B-to-B integrations. Most vertical clouds are built with the intent of nurturing partner ecosystems.

Uses of Cloud Computing

Uses of Cloud Computing
  • Create cloud-native applications- Quickly build, deploy and scale applications web, mobile and API. Take advantage of cloud native technologies and approaches, such as containers, microservices architecture, API-driven communication and DevOps.
  • Test and build applications - Reduce application development cost and time by using cloud infrastructures that can easily be scaled up or down.
  • Store, back up and recover data- Protect your data more cost-efficiently and at massive scale by transferring your data over the Internet to an offsite cloud storage system that is accessible from any location and any device.
  • Analyse data- Unify your data across teams, divisions and locations in the cloud. Then use cloud services, such as machine learning and artificial intelligence, to uncover insights for more informed decisions.
  • Stream audio and video - Connect with your audience anywhere, anytime, on any device with high-definition video and audio with global distribution.
  • Embed intelligence - Use intelligent models to help engage customers and provide valuable insights from the data captured.
  • Deliver software on demand - Also known as software as a service (SaaS) , on-demand software lets you offer the latest software versions and updates around to customers anytime they need, anywhere they are.

Developed by: