What is Cloud Service Models

What is Cloud ?.
Cloud computing computing is the on-demand availability of computer system resources,especially data storage and computing power, without direct active management by the user.The term is generally used to describe data centers available to many users over the Internet. Large clouds, predominant today, often have function distributed over multiple location from central servers. If the connection to the user is relatively close, it may be designated an edge server.

cloud service models with examples
  • There are three  types of Service models.
    • IAAS : Infrastructure as a service
    • PAAS : Platform as a Service
    • SAAS : Software as a Service

Infrastructure-as-a-service (IAAS):
Infrastructure as a service are online services that provide high-level APIs used to  dereference various low-level details of underlying network infrastructure like physical computing resources, location, data partitioning,scaling,security, backup etc. A Hypervisor, such as Xen, Oracle VirtualBox, Oracle VM, KVM, VMware ESX/ESXi, or Hyper-V, LXD, runs the virtual machines as guests. Pools of hypervisors within the cloud operational system can support a large number of virtual machines and the ability to scale services up and down according to customer’s varting requirements.
Overview
Typically Iaas involves the use of a cloud orchestration technology like OpenStack, Apache Cloudstack or OpenNebula.

Platform-as-a-service (Paas):
Platform as a service is a type of cloud computing offering offering in which a service provider delivers a platform to client, enabling them to develop, run and manage business applications without the need to build and maintain the infrastructure such software development processes typically require.

Software-as-aService (Saas):

Software as a service is a way of delivering applications over the internet as a service. Instead of installing and maintaining software, you simply access it via the Internet, Instead of installing and maintaining software, you simply access it via the Internet, freeing yourself from complex software and hardware management.

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Under IAAS (Infrastructure as a service). below service provided by Cloud provider.
Virtuallzation
Servers
Storage
Networking

Under PAAS (Platform as a Service). below service provided by Cloud provider.
        Runtime
        Middleware
        O/S
        Virtuallzation
        Servers
        Storage
        Networking
Under SAAS (Software as a Service). below service provided by Cloud provider.
        Applications
        Data
        Runtime
        Middleware
        O/S
        Virtuallzation
        Servers
        Storage
        Networking

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