By Markus Hofmann
Because the net has grown, so have the demanding situations linked to supplying static, streaming, and dynamic content material to end-users. This booklet is exclusive in that it addresses the subject of content material networking completely and comprehensively, tracing the evolution from conventional net caching to modern open and drastically extra versatile structure. With this evolutionary procedure, the authors emphasize the field's so much chronic techniques, ideas, and mechanisms--the middle info to help you comprehend why and the way content material supply works this day, and observe that wisdom sooner or later. + makes a speciality of the rules that may provide you with a deep and well timed figuring out of content material networking. + bargains dozens of protocol-specific examples exhibiting how real-life content material Networks are presently designed and carried out. + presents vast attention of content material prone, together with either the net content material version Protocol (ICAP) and Open Pluggable aspect companies (OPES). + Examines equipment for aiding time-constrained media reminiscent of streaming audio and video and real-time media corresponding to quick messages. + Combines the imaginative and prescient and rigor of a admired researcher with the sensible event of a professional improvement engineer to supply a different blend of theoretical intensity and useful program.
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Additional resources for Content Networking: Architecture, Protocols, and Practice
URLs or application type) for routing user requests to the most appropriate server. The benefits and the risks of such layer intermingling will be discussed in later chapters. Recent design controversies in the Internet community include a related observation about the progressive fattening of the hourglass waist [Dee91]. Over time, the Internet has grown immensely and has been forced to adapt to changing demands and increased stress. Its original design underwent a number of mutations, and new functionality has been added such as network support for multicast and service differentiation.
The servers are typically installed in the same location and connected to the same subnet. Incoming requests first pass through a front-end load balancer. This component dispatches requests to one of the servers based on certain metrics, such as the current server load. This approach is more flexible and shows better scalability, as it can start small with servers being added in incremental steps as they are needed. Furthermore, it provides the inherent benefit of fault tolerance. In the case of a server failure, incoming requests can still be satisfied by the remaining active servers in the farm.
Web services are interoperable building blocks for constructing complex Web applications. Once a Web service is deployed and published, other applications can automatically discover and invoke it. As an example, a digital library application could be realized by combining Web services for searching, authentication, ordering, and payment. The traditional Web model enables users to connect to content and Web applications on centralized servers. The Web Services framework adds open interfaces, which allow more complex applications to be composed of several more basic and universal services, each running on remote servers.
Content Networking: Architecture, Protocols, and Practice by Markus Hofmann