Wendell Rios

In recent years the two-tier client/server model was reevaluated and a new concept built on scalability and maintainability was born: the n-tier application development paradigm. Leveraged by Internet popularization and the consequent growth of Web data-driven applications, the multitier model uses thin, pure, interface clients, middle-tier business objects installed on application/transaction servers, and database objects on RDBMS. The multitier model is definitely more effective: more distributed, encapsulated, and generic. However, client/server development is very mature, offering well-known tested technologies, tools, and methodologies that work closely to produce applications rapidly. The introduction of the n-tier model delays the application's production line because the programming team must learn several new technologies and methods to write high-quality ... (more)

Boosting Performance on DataWindow Retrieval in n-Tier Environments

When I started using distributed DataWindows, the slow performance frightened me, usually when the middle server and the client were in separate computers. At that time I was using a PIII 500 desktop computer, and a PIII 800 database server over a 10MB network. Although it's not the top-of-the-line hardware environment, it's still the best some customers can get. Back then I had resolved to make a few sets of tests, trying to discover the reasons for performance differences between traditional client/server and the n-tier application, and possible workarounds. Despite different hea... (more)

Rapid n-Tier Windows and Web Application Development

In recent years the two-tier client/server model was reevaluated and a new concept built on scalability and maintainability was born: the n-tier application development paradigm. Leveraged by Internet popularization and the consequent growth of Web data-driven applications, the multitier model uses thin, pure, interface clients, middle-tier business objects installed on application/transaction servers, and database objects on RDBMS. The multitier model is definitely more effective: more distributed, encapsulated, and generic. However, client/server development is very mature, o... (more)

Boosting Performance on DataWindow Retrieval in n-Tier Environments

When I started using distributed DataWindows, the slow performance frightened me, usually when the middle server and the client were in separate computers. At that time I was using a PIII 500 desktop computer, and a PIII 800 database server over a 10MB network. Although it's not the top-of-the-line hardware environment, it's still the best some customers can get. Back then I had resolved to make a few sets of tests, trying to discover the reasons for performance differences between traditional client/server and the n-tier application, and possible workarounds. Despite different hea... (more)