Cloud Computing
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Definition
Cloud computing is the development of distributed computing, parallel processing, and grid computing, which represents an emerging business computing model
up, you can restore at any point;
Software in the cloud: You do not have to download and update yourself ；
Ubiquitous computing: at any time, any place, any device, log in to enjoy
In 2006,Google engineer Christophe suggest Google CEO Eric Schmidt the idea of "cloud computing“ at the first time, under the support of Schmidt, Google rollout "Google 101 plan "and formally proposed the concept of “cloud ".
computing services; Powerful computing: unlimited space,
unlimited speed
PC
C/S
Cloud Computing
Hardwarec. entric
Softwarecentric
Servicecentric
The main forms of service
(3)Infrastructure services(IaaS)
"Cloud" infrastructure consisting of multiple servers, provide me. asurement services to customers.
Origins of cloud computing
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Technical Support
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Brief Introduction
Apache Hadoop is a framework for running applications on large cluster built of commodity hardware. The Hadoop framework transparently provides applications both reliability and data motion. Hadoop implements a computational paradigm named Map/Reduce, where the application is divided into many small fragments of work, each of which may be executed or re-executed on any node in the cluster. In addition, it provides a distributed file system (HDFS) that stores data on the compute nodes, providing very high aggregate bandwidth across the cluster. Both MapReduce and the Hadoop Distributed File System are designed so that node failures are automatically handled by the framework.
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(2)Platform as a Service(PaaS)
Manufacturers provide a development environment, server platforms, hardware resources services to customers, custom develop their own application and pass through its servers and the Internet to other customers
(1)Software as a Service(SaaS)
SaaS service providers deploy application software on the server, users on demand ordered from the manufacturer via the Internet, service providers charge based on customer's needs, and to provide customers with the software through a
Users focus on application development Services are not known geographically
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The specific characteristics
பைடு நூலகம்
Data in the cloud: not afraid to lose, do not have to back
Google's concept of “cloud computing” is a picturesque phrase, to describe Google's business model and computing technology architecture in a romantic way.therefore, cloud computing consists two levels of meaning, in commercial level, just the "cloud“; in the technical level is "computing",combined the cloud and computing to illustrate that Google is different with traditional software and hardware companies in business models and computing architecture. This is just a very beautiful and very romantic metaphor.
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Cloud Computing Summary
Cloud computing is a kind of network service and is a trend for future computing
Scalability matters in cloud computing technology