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N-Tier implementation means using whatever mix of Computer Hardware and / or Software Layers you need, in order to achieve desired results. N-tier architecture can be compared to a Lego constructor set any number of component-based clients, interfaces, agents, transactions, middleware and data servers flexibly can be connected to get a desired network. Like in Lego, all building block are modular and independent. That is the beauty of n-tier.
The rapid move to the N-Tier network computing model, indicates a powerful computing trend and is currently having a huge impact on both Enterprise and Web-based applications. These systems are also called as: thin-client, browser-based, network-centric or multi-tiered computing, N-Tier computing encapsulates all of these concepts, which in turn sprout in infinite number of network configurations matching almost any business situation. Despite the overall and rather steep decline in IT budgets of most business that can be attributed to poor economic climate, N-tier solutions has shown a steady growth. Companies are somewhat reluctant to invest in completely new and unproven technologies, but N-tier or solutions gained wide-spread acceptation; they allow companies to make most of their investment. Nearly two thirds of respondents in research conducted by Giga Information Group have already deployed n-tier technology in one or another way. Although only 32 percent believe it is strategic technology, almost all of the surveyed see short-term return on investment (ROI).
The upcoming years will introduce more of Web Services and Web portal elements into n-tier architecture. Some systems that once employed thin client as an isolated operating environment, will be integrated with Web Services. Due mainly to the financial benefits that brings n-tier architecture, Giga expects the market to grow by 10 percent to 20 percent annually through 2004 to as much as $ 2. 4 billion. If n-tier technology, particularly middle-ware solution, was initially realized as a primary workgroup and remote access solution, now it is making its way right into large enterprise deployments. Citrix, which is a leading vendor in SBC product niche, has enjoyed fast growth: if in 1999 it installed 300 seats than in 2000 they supplied approximately 1000 seats. Application integration and re-engineering software market is hard to imagine without n-tier technology.
According to Framingham, Mass. -based market research firm, this niche will reach around $ 10 billion by 2004. A good example of a growing company in this sector is Relativity Technologies, the company's strategy is to adapt legacy applications to n-tier and e-business architectures, rather than just inventorying the older Cobol, PL/I, and Natural Adabas programs, says Len Erlikh, CTO of Relativity, in Research Triangle Park, N. C. He also stressed that the key is seeing business rules and making the components reflect these rules. The companys Rescue Ware 6. 0, a package for automating the transformation of legacy business assets to modern e-business architectures aimed to do exactly that. The tool helps to alter original systems' rules and workflow to meet the design goals of the newer applications.
A number of companies choose services similar to Relativity's to rewrite existing code rather than create new for economical considerations, said Dana Gardner, an analyst at Aberdeen Group, in Boston. For example, National City, a Cleveland-based bank holding company encountered problems with its client server application that was internally developed. The software was difficult to support, besides it had Y 2 k problems. Jim Hughes, CIO, said "We had to keep the application but didn't want to pay for a rewrite. " The company opted for Rescue Ware, Relativity's software, which helped to convert the application to provide thin client interface, so that back-end data can be accessed trough browser interface. Flexibility of n-tier architecture helped National City to save around $ 3 million had the company decided to purchase a application. The above are only few examples of successful employment of n-tier architecture.
The fact that around eighty percent of 1000 Fortune companies have adopted n-tier architecture speaks for himself. Yet, with the growing popularity of hand-held computing devices, n-tier or thin client architecture is going to get a new momentum. Mobile N-tier Mobile devices is something IT industry is buzzing about; this small computers are inexpensive allow access to critical data in increasingly mobile business world, allowing companies be closer to the customer. This means better service, more efficient resource management and consequently competitive advantage on the market place.
N-tier architecture has great potential delivering business data and processes in the real of mobile computing. Today's n-tier architectures usually incorporates a business object layer based on a distributed object technology like Common Object Request Broker Architecture (CORBA), Distributed Common Object Model (DCOM), or Enterprise JavaBeans (EJB).
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Research essay sample on N Tier Architecture N Tier Technology Business
