This document provides an overview of cloud computing fundamentals. It defines cloud computing as on-demand access to configurable computing resources over the internet. The document discusses key cloud concepts like deployment models (private, public, hybrid, community clouds), service models (IaaS, PaaS, SaaS), and requirements for cloud services. Popular cloud providers like AWS, Azure, Google Cloud are presented for each service model. Benefits of cloud computing are also highlighted such as reduced costs, flexibility, and global access to resources.

1. Cloud Computing
Fundamentals
Yong Heui Cho @ Mokwon University
Some of slides are referred to and all credits should go to:
[1] K. Chandrasekaran, Essentials of Cloud Conputing, CRC Press, 2015.

2. 2
Cloud Computing
• Why cloud?
– Cost
– Flexibility
– Security
– Storage
• Internet!

3. 3
Definition
• Cloud computing is a model for enabling
ubiquitous, convenient, on-demand
network access to a shared pool of
configurable computing resources (e.g.,
networks, servers, storage, applications,
and services) that can be rapidly
provisioned and released with minimal
management effort or service provider
interaction.

4. 4
Cloud Provider
• Amazon Web Services
• Microsoft Azure
• IBM/Google Cloud

5. 5
AWS Data Centers
Edge location:
contents are cached
after retrieving them
from the origin server

6. 6
Example of Game Server

7. 7
Netflix Using AWS Cloud

8. 8
5 Essential Characters

9. 9
4 Deployment Models
• Private cloud
• Public cloud
• Community cloud
• Hybrid cloud

10. 10
3 Service Models
AWS
Google App Engines
MS Azure Services

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Requirements for Cloud (I)
• Multitenancy
– Maximizing resource sharing
• Service life cycle management
– Started and ended at any time
• Security
• Responsiveness
– Early detection and fixing of service-related
problems

12. 12
Requirements for Cloud
(II)
• Intelligent service deployment
– Efficient use of resources with maintaining
the SLA (Service Level Agreement)
• Portability
– Cloud workload portability with limited
service disruption
• Interoperability
– Working together with heterogeneous
systems

13. 13
Requirements for Cloud
(III)
• Regulatory aspects
– Including privacy protection
• Environmental sustainability
– Especially in data centers
• Service reliability
– QoS (quality of service)
• Service access
– Easy access to cloud services

14. 14
Requirements for Cloud
(IV)
• Flexibility
– Supporting multiple deployment models
and service categories
• Accounting and charging
– Various accounting and charging models
and policies
• Massive data processing

15. 15
Benefits of Cloud (I)
• Achieve economies of scale
• Reduce spending on infrastructure
• Globalize the workforce: worldwide access
• Streamline business processes: more work
in less time and resource
• Reduce capital costs
• Pervasive accessibility: accessed anytime
and anywhere

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Benefits of Cloud (II)
• Monitor projects more effectively
• Less personal training is needed
• Minimize maintenance and licensing
software
• Improved flexibility

17. 17
Cloud Service Model

18. 18
Vendors

19. 19
IaaS
• Infrastructure as a service

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Services by IaaS
• Compute: computing as a service (CPU
and RAM of VM)
• Storage: back-end storage for VM
images and files
• Network: network as a service (virtual
router, switch, and bridge for VM)
• Load balancers: load balancing as a
service

21. 21
Popular IaaS Providers

22. 22
PaaS
• Platform as a service

23. 23
Services by PaaS
• Programming languages: Java,
JavaScript
• Application frameworks: Node.js,
Vue.js, Nuxt.js
• Databases: PostgresSQL
• Other tools

24. 24
Popular PaaS Providers

25. 25
SaaS
• Software as a service

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Services by SaaS
• Business services
• Social networks
• Document management
• Mail services

27. 27
Popular SaaS Providers