introduction to web technology and web application

Dec 22, 20240 likes21 views

Enable multiple users (tenants) to access the same application simultaneously • Multitenant applications ensure that tenants do not have access to data and configuration information that is not their own

Enabling technologies
1. Broadband networks and internet architecture
2. Data center technology
3. Virtualization technology
4. Web technology
5. Multitenant technology
2

1. Broadband networks & Internet architecture
• All clouds must be connected to a network
• Internet’s largest backbone networks, established
and deployed by ISPs, are interconnected by core
routers
 ISP: internet service provider
3

Internet connecting provider and consumer
4

Two fundamental components
• Connectionless packet switching
 End‐to‐end (sender‐receiver pair) data flows are divided
into packets of a limited size
 Packets are processed through network switches and
routers, then queued and forwarded from one
intermediary node to the next
• Router‐based interconnectivity
 A router is a device that is connected to multiple
networks through which it forwards packets
 Each packet is individually processed
 Use multiple alternative network routes
5

2. Data Center Technology
• A data center is a facility used to house computer
systems and associated components, such as
telecommunications and storage systems
 Virtualization
 Standardization and Modularity
 Automation
 Remote Operation and Management
8

Standardization and Modularity
• Data centers are built upon standardized
commodity hardware and designed with modular
architecture.
10

Supercomputer vs. data center
• Handouts
11

3. Virtualization technology
• Virtualization is a process of converting a physical IT
resource into a virtual IT resource
 Server
 Virtual server ↔ virtual machine
 Storage
 Network
 Power
12

Creating a new virtual server
• Allocation of physical IT resources
• Installation of an operating system, i.e., guest
operating system
13

Hardware based virtualization
• Reduce the overhead
• May introduce compatibility issue
14

4. Web technology
• Cloud computing relies on internet.
• Web technology is generally used as both the
implementation medium and the management
interface for cloud services
15

Basic web technology
• Uniform resource locator (URL)
 Commonly informally referred to as a web address
 a reference to a web resource that specifies its location
on a computer network and a mechanism for retrieving
it
 Example: http://www.example.com/index.html
• Hypertext transfer protocol (HTTP)
 Primary communication protocol used to exchange
content
• Markup languages (HTML, XML)
 Express Web‐centric data and metadata
16

Web applications
• Applications running in a web browser
 Rely on web browsers for the presentation of user‐
interfaces
17

5. Multitenant technology
• Enable multiple users (tenants) to access the same
application simultaneously
• Multitenant applications ensure that tenants do
not have access to data and configuration
information that is not their own
18

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introduction to web technology and web application

1. Cloud‐Enabling Technology 1

2. Enabling technologies 1. Broadband networks and internet architecture 2. Data center technology 3. Virtualization technology 4. Web technology 5. Multitenant technology 2

3. 1. Broadband networks & Internet architecture • All clouds must be connected to a network • Internet’s largest backbone networks, established and deployed by ISPs, are interconnected by core routers  ISP: internet service provider 3

4. Internet connecting provider and consumer 4

5. Two fundamental components • Connectionless packet switching  End‐to‐end (sender‐receiver pair) data flows are divided into packets of a limited size  Packets are processed through network switches and routers, then queued and forwarded from one intermediary node to the next • Router‐based interconnectivity  A router is a device that is connected to multiple networks through which it forwards packets  Each packet is individually processed  Use multiple alternative network routes 5

6. Packets travelling through Internet 6

7. Internet reference model 7

8. 2. Data Center Technology • A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems  Virtualization  Standardization and Modularity  Automation  Remote Operation and Management 8

9. Virtualization 9

10. Standardization and Modularity • Data centers are built upon standardized commodity hardware and designed with modular architecture. 10

11. Supercomputer vs. data center • Handouts 11

12. 3. Virtualization technology • Virtualization is a process of converting a physical IT resource into a virtual IT resource  Server  Virtual server ↔ virtual machine  Storage  Network  Power 12

13. Creating a new virtual server • Allocation of physical IT resources • Installation of an operating system, i.e., guest operating system 13

14. Hardware based virtualization • Reduce the overhead • May introduce compatibility issue 14

15. 4. Web technology • Cloud computing relies on internet. • Web technology is generally used as both the implementation medium and the management interface for cloud services 15

16. Basic web technology • Uniform resource locator (URL)  Commonly informally referred to as a web address  a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it  Example: http://www.example.com/index.html • Hypertext transfer protocol (HTTP)  Primary communication protocol used to exchange content • Markup languages (HTML, XML)  Express Web‐centric data and metadata 16

17. Web applications • Applications running in a web browser  Rely on web browsers for the presentation of user‐ interfaces 17

18. 5. Multitenant technology • Enable multiple users (tenants) to access the same application simultaneously • Multitenant applications ensure that tenants do not have access to data and configuration information that is not their own 18

19. A simple example 19

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