OCI: Cloud Service Models OCI Basis Part-1

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Cloud services Models 

Here we will see the simple definaltion and concepts for cloud service models.

  • Saas Software as a services
  • Paas Platform as a service
  • Iaas Infrastructure as a service.

 

Exactly how each service differs from the other is shown in the diagram below.



Traditional on-premises

Everything is handled by the client. For example, we need to manage complete servers and applications, networks, operating systems, and so on.

Infrastructure as a service

Infrastructure side managed by the cloud vendor ex(Oracle, azure, aws) and application data Middleware and OS clint responsibility

For example, it is the client's duty if an OS patch needs to be applied. Vendor responsibility if any N/W or storage-related setups

 

Platform as a service: -

A cloud vendor will offer the services on any platform required to operate the application.

Ex: Oracle offers middleware and database products; customers install applications on top of those products and load data.


Software as a services

Everything is handled by the cloud vendor; the customer only needs to load the data and begin utilising the services.

Oracle SCM applications, for example.

 

Hypervisor

  • If virtualization is defined as enabling to multiple VM machines to create a single host computer.
  • This hypervisor, also known as Virtual Machine Monitor (VMM).
  • There are two types of hypervisor is available in  OCI. Will see the difference in below table.
  • Oracle is currently encouraging Gen 2 customers who are slowly upgrading to Gen 1 to gen2. If you are an Oracle new customer receiving the gen2

Type 1 Hypervisor

Type 2 Hypervisor

Installed on running on hardware

Installed directly on OS

Xen hypervisor (Gen 1)

KVM Hypervisor (Gen2)

Installation is simple, although technical knowledge is required.

Simple to set up and maintain

Supporting only VMs

Supporting Bare-Metal and VMs

 

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