Introduction to Cloud Computing

The phrase cloud computing implies something, but exactly what is it? In this part, we introduce the concept and provide a simple graphic that describes the layers of cloud computing. We also examine the value that the cloud can bring to business organization and look at some of the associated business issues.

By. Ms. Chong

​Introduction to Cloud Computing

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Learning Outcomes 1:

​To undertand what is cloud computing and its architecture.

Draw

When i say cloud computing, what you will think about?

Cloud computing:

• It's the delivery of computing services over the internet, which is otherwise known as the cloud.

• These services include servers, storage, databases, networking, software, analytics, and intelligence.

• ​It offers faster innovation, flexible resources, and economies of scale.

Why is cloud computing typically cheaper to use?

1. Lower their operating costs

2. Run their infrastructure more efficiently.

3. Scale as their business needs change.

​Cloud computing is the delivery of computing services over the internet by using a pay-as-you-go pricing model. This help businessman to :

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​Virtualization

• ​Virtualization is the process of creating a virtual instance of a device, such as a virtual server or virtual operating system. ​

• Most virtualization is performed through virtualization software.

  These programs have the capability to extend the hardware of the physical machine, network, or storage system, and create virtual versions of these systems.

  One example of a virtualization program is called a hypervisor

Adding more components in parallel to spread out a load

Making a component bigger or faster so that it can handle more load

​Understand the word of "Scaling" in cloud!

Based on this diagram, it is consider as scale up or scale out?

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Scenario 1:

Based on this diagram, it is consider as scale up or scale out?

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Scenario 2:

Elasticity

vs

Scalability

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Scalability is the property of a system to handle a growing amount of work by adding resources to the system.

High availability,

Redundancy,

Fault Tolerance

Fault-tolerant EC2 servers with an auto-scaling group and ELB

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• Availability zones —Two are used. If one AZ goes down, we still have EC2 instances running in the other AZ.

• Subnets —A subnet is tightly coupled to an AZ. Therefore we need one subnet in each AZ, and subnets are also redundant.

• EC2 instances —We have multi-redundancy for EC2 instances. We have multiple instances in a single subnet (AZ), and we have instances in two subnets (AZs).

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​Part 1: Terminologies

• Pay as you go pricing

• Services / Resources​

• Multi-tenancy

• Virtualization & Hypervisor

• Scale up & Scale out

• Auto Scaling & Load balancing

• Elasticity & Scalability​

Quiz Time!

5 Minutes Break!

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Learning Outcomes 2:

​To understand the stage evolution of Cloud Computing.

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​Cloud vs Fog vs Edge

​The fog layer is composed of powerful devices that should make decisions, store data, and manage edge devices connected through the radio access network (RAN), for example, WLAN, WiMAX, and cellular networks.

The edge layer is composed of IoT end-devices. It allows you to collect information from multiple different devices from different manufacturers.

​Amazon Brings Machine Learning Smarts To Edge Computing Through AWS Greengrass

​Part 2: Terminologies

• Mainframe

• Supercomputer

• ​Cluster

• ​Distributed computing

• ​Grid Computing

• ​Cloud Computing

• Fog Computing (latest)

• Edge Computing​ (latest)

Summary: What we learnt today?

Next Class:

• Public vs Private

• Hybrid vs Community

• IaaS, PaaS, SaaS​

• Type of Virtualization

Thank you!

see you in next class...

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