About cloud computing concepts and models.

1. Cloud Computing
Shail Gautam

2. Agenda
- Cloud
- Cloud Computing
- Cloud Computing Characteristics
- Advantages
- Disadvantages
- Virtualization
- Types of Virtualization
- Cloud Computing Models
- Conclusion

3. Cloud?
The term Cloud refers to Servers that are accessed over the internet, software
and databases that run on those servers. The Cloud servers are located in data centers
all over the world.
And through a network layer cloud establishes the connection between the client
device and distributed servers.

4. Cloud Computing?
Cloud Computing is on-demand availability of computer system resources
especially data storage and computing powers (like servers, databases etc.) over
the internet without worrying about any maintenance or management of actual
resources.
It allows companies to minimize the physical hardware cost and get their
application running faster with improved manageability and less maintenance as
well as it enables IT team to meet fluctuating and unpredictable demand.

5. Cloud Computing

6. Companies using Cloud

7. Cloud Computing Characteristics
Core attributes of cloud computing services are:
1. Scalability & Elasticity
2. On-demand
3. Provider-pooled computing resources
4. Metered service usage
5. Broad network access

8. Advantages
- Lower computer costs
- Improved performance
- Reduced software costs
- Instant software updates
- Unlimited storage capacity
- Increased data reliability
- Universal document access
- Latest version availability
- Easier group collaboration
- Device independence

9. Disadvantages
- Requires a constant Internet connection
- Does not work well with low-speed connections
- Features might be limited

10. Virtualization
- Virtualization is one of the core concepts that enable cloud computing
- An ability that allows you to share the physical instance of an application or
resource with multiple users.

11. Types of Virtualization

12. Basic Concepts
There are certain services and models working behind the scene making the cloud
computing feasible and accessible to end users. Following are the working models for
cloud computing:
Cloud
Computing Models
Service
Models
Deployment
Models

13. Deployment Models
Deployment models define the type of access to the cloud, i.e.,
how the cloud is located?
Cloud can have any of the four types of access.

14. Public
Cloud

15. Public Cloud
- Provides a shared platform to Public
- May be Less Secure
- Common storage is used
e.g., Google Drive, Gmail.

16. Public
Cloud
Private
Cloud

17. Private Cloud
- Accessible within an organization
- More Secure
- Not available for general public
e.g. Dell, Oracle

18. Public
Cloud
Private
Cloud
Community
Cloud

19. Community Cloud
The Community Cloud allows systems
and services to be accessible by group
of organizations.
e.g. Google Apps for Government

20. Public
Cloud
Private
Cloud
Community
Cloud
Hybrid
Cloud

21. Hybrid Cloud
- Mixture of public and private cloud.
- Critical activities are performed by
private cloud
- Non-critical activities are performed
by public cloud.
e.g. VMware vCloud, Azure

22. Service Models

23. Infrastructure as a Service (IaaS)
Infrastructure as a Service (IaaS) is a cloud computing service where enterprises rent
or lease servers for compute and storage in the cloud. Users can run any operating
system or applications on the rented servers without the maintenance and operating
costs of those servers.
Benefits:
- Continuity and disaster recovery
- Faster scaling
- Core focus

24. Platform as a Service (PaaS)
PaaS specifically provides a platform for customers to develop, run, and
manage applications without building and maintaining the cloud
infrastructure required to develop and launch an app.
Benefits:
- API development and management
- Business process management
- Databases
- Communication

25. Software as a Service (SaaS)
Software as a service (or SaaS) is a way of delivering applications over the
Internet—as a service. Instead of installing and maintaining software, you simply
access it via the Internet, freeing yourself from complex software and
hardware management.
Benefits:
- Reduced time to benefit
- New releases (upgrades)
- Better Access

27. THANK
YOU!!