Cloud computing and client-server architecture
Client Server Architecture
The client–server model is a distributed application structure that partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients. Often clients and servers communicate over a computer networka group or system of interconnected people or things. on separate hardware, but both client and server may reside in the same system. A server host runs one or more server programs which share their resources with clients. A client does not share any of its resources, but requests a server's content or service function. Clients therefore initiate communication sessions with servers which await incoming requests. Examples of computer applications that use the client–server model are Email, networka group or system of interconnected people or things. printing, and the World Wide Web.
Cloud computing is a model for enabling ubiquitous, convenient, on-demand networka group or system of interconnected people or things. access to a shared pool of configurable computing resources (e.g., networksa group or system of interconnected people or things., servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.
This cloud model is composed of five essential characteristics, three service models, and four deployment models.
- On-demand self-service. A consumer can unilaterally provision computing capabilities, such as server time and networka group or system of interconnected people or things. storage, as needed automatically without requiring human interaction with each service provider.
- Broad networka group or system of interconnected people or things. access. Capabilities are available over the networka group or system of interconnected people or things. and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g.,mobile phones, tablets, laptops, and workstations).
- Resource pooling. The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction (e.g., country, stateGive a specific name, value or other brief answer without explanation or calculation., or datacenter). Examples of resources include storage, processing, memory, and networka group or system of interconnected people or things. bandwidth.
- Rapid elasticity. Capabilities can be elastically provisioned and released, in some cases automatically, to scale rapidly outward and inward commensurate with demand. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be appropriated in any quantity at any time.
- Measured service. Cloud systems automatically control and optimize resource use by leveraging a metering capability1 at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer of the utilized service.
Do you understand this?
From the IB: Student should address the major differences only.
These standards are used from the IB Computer Science Subject Guide
- DescribeGive a detailed account or picture of a situation, event, pattern or process. how cloud computing is different from a client-server architecture.
- IB Diploma Programme Computer science guide (first examinations 2014). Cardiff, Wales, United Kingdom: International Baccalaureate Organization. January 2012.