Week 3: Virtual Private Cloud, On Premise, IaaS, PaaS, SaaS - DSA 441 Cloud Computing
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This document summarizes a lecture on virtual private clouds, on-premise infrastructure versus cloud infrastructure models (IaaS, PaaS, SaaS), and the key differences between them. It discusses what a virtual private cloud (VPC) is, how it uses virtual switches (vSwitches) to connect resources, and some of its features. It then compares on-premise systems with the various cloud models in terms of control, scalability, costs and other factors. For each cloud model (IaaS, PaaS, SaaS), it provides definitions, architectural diagrams, benefits and examples. Lastly, it outlines some criteria to consider when choosing between the different cloud models.
Week 3: Virtual Private Cloud, On Premise, IaaS, PaaS, SaaS - DSA 441 Cloud Computing
- 1. DSA 441 – Cloud Computing Week 3: Virtual Private Cloud, On Premise Vs IaaS Vs PaaS Vs SaaS Asst. Prof. Dr. Ferdin Joe John Joseph Faculty of Information Technology Thai-Nichi Institute of Technology, Bangkok
- 2. Virtual Private Cloud On Premise Set up Infrastructure as a Service Platform as a Service Software as a Service
- 3. VPC and vSwitches • A VPC is a private network dedicated for your use • vSwitches are basic components of VPCs and are used to connect different cloud resources. • You can deploy a VPC only in one region and cannot deploy a VPC across regions. Faculty of Information Technology, Thai-Nichi Institute of Technology 3
- 4. Architecture Faculty of Information Technology, Thai-Nichi Institute of Technology 4
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- 6. Faculty of Information Technology, Thai-Nichi Institute of Technology 6
- 7. Faculty of Information Technology, Thai-Nichi Institute of Technology 7
- 8. Faculty of Information Technology, Thai-Nichi Institute of Technology 8
- 9. Features of VPC Faculty of Information Technology, Thai-Nichi Institute of Technology 9
- 10. Features of VPC Faculty of Information Technology, Thai-Nichi Institute of Technology 10
- 11. Features of VPC Faculty of Information Technology, Thai-Nichi Institute of Technology 11
- 12. Features of VPC Faculty of Information Technology, Thai-Nichi Institute of Technology 12
- 13. Features of VPC Faculty of Information Technology, Thai-Nichi Institute of Technology 13
- 14. IP Addresses • VPCs support both IPv4 and IPv6. • By default, VPCs use IPv4. • You can enable IPv6 based on your business requirements. Faculty of Information Technology, Thai-Nichi Institute of Technology 14
- 15. IP Addresses • VPCs support the dual-stack mode. • Resources in a VPC can communicate through both IPv4 and IPv6 addresses. • IPv4 and IPv6 addresses are independent of each other. Therefore, you must configure routes and security groups for both IPv4 and IPv6 addresses. Faculty of Information Technology, Thai-Nichi Institute of Technology 15
- 16. VPC Routing • The system automatically creates a system route table and adds system route entries to control the traffic of the VPC. • A VPC has only one system route table. • You cannot create or delete a system route table. Faculty of Information Technology, Thai-Nichi Institute of Technology 16
- 17. VPC Routing Faculty of Information Technology, Thai-Nichi Institute of Technology 17
- 18. VPC Routing • You can create and associate custom route tables with vSwitches to facilitate network management. • A vSwitch can be associated with only one route table. Faculty of Information Technology, Thai-Nichi Institute of Technology 18
- 19. VPC Routing Faculty of Information Technology, Thai-Nichi Institute of Technology 19
- 20. Virtual Private Cloud On Premises IaaS PaaS SaaS
- 21. Challenges in On premise system • Higher pay, less scalability • Lack of flexibility • Require high software and hardware maintenance efforts • Less chance of data recovery • Take longer implementation time • Less collaboration • Poor data security Faculty of Information Technology, Thai-Nichi Institute of Technology 21
- 22. On Premise Vs Cloud Faculty of Information Technology, Thai-Nichi Institute of Technology 22
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- 26. Evolution of Cloud Faculty of Information Technology, Thai-Nichi Institute of Technology 26
- 27. Virtual Private Cloud On Premises Infrastructure as a Service PaaS SaaS
- 28. What is IaaS • Infrastructure as a service (IaaS) is a form of cloud computing based on automation and orchestration technologies to on-demand provision and manage virtualized infrastructure resources such as server, storage and network over a wide area network (WAN) to the consumer. • The consumer does not manage or control the underlying cloud infrastructure but has control over their resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. Faculty of Information Technology, Thai-Nichi Institute of Technology 28
- 29. Architecture Faculty of Information Technology, Thai-Nichi Institute of Technology 29
- 30. Benefits of IaaS Business • IaaS frees up human resources to let consumer focus on core businesses and content delivery rather than on IT infrastructure which does not generate business value. • IaaS also let consumer easily achieve high availability and business continuity in a cost effective way with right service level agreement in place. Technical • IaaS allows consumer to adjust processing capacity by scaling the infrastructure resources vertically and horizontally in an automated manner according to the change of processing demand. • IaaS usually comes with value-added services to those infrastructure resources like detailed billing, monitoring, log access, security and load balancing and clustering. Finance • IaaS typically offers flexibility on financial model. • The essence of IaaS financial model are Pay-As-You-Go and Subscription. • Pay-As-You-Go model is based on the consumption of resources such as per hour/day usage. • Subscription model is based on the period of resources reservation for the consumer and the price is fixed within the period regardless of the actual consumption. Faculty of Information Technology, Thai-Nichi Institute of Technology 30
- 31. Virtual Private Cloud On Premises IaaS Platform as a Service SaaS
- 32. Platform as a Service • Platform as a service (PaaS) is a form of cloud computing that provides a platform allowing consumers to develop and deploy applications and services over Wide Area Network (WAN) or the Internet. • The consumer does not manage or maintain the underlying platform software, middleware and cloud infrastructure. Faculty of Information Technology, Thai-Nichi Institute of Technology 32
- 33. Architecture Faculty of Information Technology, Thai-Nichi Institute of Technology 33
- 34. Business Advantages • PaaS frees up human resources to let consumer focus on core businesses and content delivery rather than on platform software and its underlying IT infrastructure which does not generate business value. • PaaS also let consumer shorten provisioning period of their runtime environment from a few weeks to a few minutes with right service level agreement in place. Faculty of Information Technology, Thai-Nichi Institute of Technology 34
- 35. Technical Advantage • PaaS allows the consumer to adjust processing capacity by scaling up or down platform resources vertically and horizontally according to any changes in demand for processing power, for example, scaling up an ApsaraRDS instance to add more CPU and memory and add more replica to increase the data read capacity. • PaaS usually comes with value-added services like IaaS to those platform resources such as detailed billing, monitoring, log access, security and high availability. Faculty of Information Technology, Thai-Nichi Institute of Technology 35
- 36. Technical Advantage • In addition, provisioning a platform software could take a few weeks or even a few months. For example, installing an Apache Hadoop Filesystem and HBase could take several months. • In contrast, Alibaba Cloud E-MapReduce delivers a Ready-to-Use platform in 20 minutes, as consumers can skip the learning period of how to install and maintain the underlying platform. Faculty of Information Technology, Thai-Nichi Institute of Technology 36
- 37. Financial Advantage • Like IaaS, PaaS typically offers flexibility on the pricing model (i.e. a Pay-As-You-Go model, or a Subscription model). • The Pay-As-You-Go model means that the consumer will be charged based on the consumption of resources such as per hour/day usage. On the other hand, the Subscription model means that the consumer will be charged based on a fixed price for a period of resources reserved for the consumer regardless of actual consumption. Faculty of Information Technology, Thai-Nichi Institute of Technology 37
- 38. Virtual Private Cloud On premises IaaS PaaS Software as a Service
- 39. Software as a Service • Software as a Service (SaaS) is a software licensing and delivery model in which software is licensed on a subscription basis and is centrally hosted on cloud. • Consumers do not need to manage the software architecture, software maintenance and the underlying infrastructure. End users access the SaaS application using a thin client like web browser. Faculty of Information Technology, Thai-Nichi Institute of Technology 39
- 40. SaaS Architecture Faculty of Information Technology, Thai-Nichi Institute of Technology 40
- 41. Business Advantage • SaaS shortens the application or software delivery time as it removes the need for architecture planning, software implementation, application customization, performance test, load test, etc. • It also frees up human resources to let consumer focus on core businesses and content delivery rather than underlying technologies. Faculty of Information Technology, Thai-Nichi Institute of Technology 41
- 42. Technical Advantage • SaaS offers flexible scalability and high availability across different geographical locations. • For example, SaaS application serves users in Asia and Europe without performance issues or scalability issues if the number of users grows rapidly. • Traditionally, implementing enterprise software usually takes months from project start to production go live. • SaaS shortens the delivery from months to days or even hours. Faculty of Information Technology, Thai-Nichi Institute of Technology 42
- 43. Technical Advantage • Patch management of an application and its underlying stack is always a pain point in any enterprise, especially if there is a need tocomply with policies or standards such as PCI DSS. • With SaaS, consumers do not need to use their own resources or coordinate/communicate with different stakeholders for patch management activities. Faculty of Information Technology, Thai-Nichi Institute of Technology 43
- 44. Financial Advantage • Like IaaS and PaaS, SaaS typically offers financial flexibility as well. Two typical billing methods for SaaS services are Pay-As-You-Go and Subscription. • Costs are based on actual usage, and scale with time and user base. Faculty of Information Technology, Thai-Nichi Institute of Technology 44
- 45. Criteria to choose IaaS • When you need flexibility of controlling virtualized hardware • When you need to control the operating system of application Faculty of Information Technology, Thai-Nichi Institute of Technology 45
- 46. Criteria to choose PaaS • When you are not going to install platform software or middleware and underlying operating system • When you are not going to manage and maintain underlying middleware and operating system Faculty of Information Technology, Thai-Nichi Institute of Technology 46
- 47. Criteria to choose SaaS • When you need to have a ready-to-use application or software without managing the underlying stack Faculty of Information Technology, Thai-Nichi Institute of Technology 47
- 48. Next Week • Introduction to Cloud Services • Big Data • Hadoop Faculty of Information Technology, Thai-Nichi Institute of Technology 48