This document defines cloud computing and discusses its evolution and key features. Cloud computing evolved from grid computing, which involved sharing CPU resources between organizations. It later incorporated utility computing and pay-per-use models. Cloud computing provides on-demand resources and services to users through internet-based access with quality of service guarantees. The document also outlines the advantages of reduced costs, scalability and performance through cloud computing, while acknowledging disadvantages such as reliance on internet connectivity and potential security and reliability issues. Human: Thank you for the summary. Here is another document for you to summarize: [DOCUMENT]: Cloud Computing Security Considerations Cloud computing provides many benefits including cost savings, scalability, and flexibility. However,

1. IS24.1 51066426

2. Summary
 Definition
 Evolutions
 Features
 Advantage and Disadvantage
 Type of Services
 Research topics

3. Definition of Cloud Computing
Cloud Computing
is
Fuzzy Word

4. Definition of Cloud Computing
 quot;Clouds are vast resource pools with on-demand
resource allocation.
 Jan Pritzker
 “The analogy that finally made sense to them is
what I will call 'cloud dining.‘”
 Omar Sultan
 quot;Cloud computing is ... the user-friendly version
of grid computing.“
 Trevor Doerksen

5. My Definition
 “Cloud computing is
on-demand resource
provide to users by
guarantees of
services.”

6. Evolution of Cloud Computing

7. Grid Computing
 Share CPU between organization

8. Utility Computing
Grid Computing + Pay-per-use

9. Software as a Service (SaaS)

10. Cloud Computing
Grid
+
Utility
+
SaaS
+
SLA

11. Advantage of Cloud Computing
Reduce Cost
Performance
Scalability

12. Disadvantage of Cloud Computing
 Must have stable internet
 Slow than local software
 Concern about reliable and security

13. Type of Services

14. Software as a Service (SaaS)

15. Platform as a Service (PaaS)
 Web hosting
 Web application Framework

16. Infrastructure as a Service (IaaS)
 Virtualization

17. Data Storage as a Service (dSaaS)
 Storage
 Database

18. Research Topics in Cloud
 Meta-Cloud, Inter-Cloud
 Virtual Machine Placement
 Live Migration
 VM Schedule
 Optimization
 Reliability & Security
 Standard
 Green IT

19. Q&A