Lecture 20 Ch 19 Flashcards
Five general characters of the cloud
- on-demand self-service
- broad network access
- resource pooling
- rapid elasticity
- measured service
What is cloud computing?
Hosting computers, or cloud providers, deliver services to subscribers over the Internet
Platform-as-a-Service (PaaS)
Permits subscribers to have remote access to:
- applications development
- interface development
- database development
- storage and testing
Software-as-a-Service (SaaS)
-Enables software to be deployed from provider, delivered over the Internet, and accessed by subscriber
-primary reason to subscribe:
~limited risk
~rapid deployment
~fewer upfront costs
~increased reliability
~standardized backup procedures
~Lower total cost of ownership (TCO)
Scale and cost of cloud
Organization doesn’t have to purchase equipment, license software, and hire personnel
Encapsulated change management
Hardware and associated technology can be maintained, redistributed, and redirected without major reconfiguration
Choice and agility
Subscriber deployed solutions that best suit current needs and trends
Next-generation architectures
Innovation and foresight in IT are not a threat to the bottom line or current operations
Pros to cloud
- scale and cost
- encapsulated change management
- choice and agility
- next-generation architectures
Lock-in
Able to switch providers without losing ability to access data
Reliability
Provider could lose power, run into trouble, burn down, or simply go out of business
Lack of control
Control of resources is surrendered to someone in the cloud
Security
- Concerns are centered on dates being stored on servers owned and controlled by the cloud provider
- results in compromise between cost and risk management
