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Written by Chris Gountanis
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 In software engineering, multi-tier architecture (often referred to as n-tier architecture) is a client–server architecture in which the presentation, the application processing, and the data management are logically separate processes. For example, an application that uses middleware to service data requests between a user and a database employs multi-tier architecture. The most widespread use of multi-tier architecture is the three-tier architecture. N-tier application architecture provides a model for developers to create a flexible and reusable application. By breaking up an application into tiers, developers only have to modify or add a specific layer, rather than have to rewrite the entire application over. There should be a presentation tier, a business or data access tier, and a data tier. The concepts of layer and tier are often used interchangeably. However, one fairly common point of view is that there is indeed a difference, and that a layer is a logical structuring mechanism for the elements that make up the software solution, while a tier is a physical structuring mechanism for the system infrastructure.
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Last Updated on Thursday, 30 September 2010 11:56 |
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Written by Chris Gountanis
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 Android 2.1 is a minor platform release deployable to Android-powered handsets starting in January 2010. This release includes new API changes and bug fixes. For information on changes, see the Framework API section. For developers, the Android 2.1 platform is available as a downloadable component for the Android SDK. The downloadable platform includes a fully compliant Android library and system image, as well as a set of emulator skins, sample applications, and more. The downloadable platform includes no external libraries. To get started developing or testing against the Android 2.1 platform, use the Android SDK and AVD Manager tool to download the platform into your SDK. For more information, see Adding SDK Components. Android 2.1 does not add significant user features, see the Android 2.0 Platform Highlights document for the latest user features.
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Last Updated on Wednesday, 19 May 2010 15:27 |
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Written by Chris Gountanis
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 A CentOS Net Install (CentOS NetInstall) is basically installing from a very small downloaded ISO image which downloads the needed files to complete the full operating system installation on-the-fly. This documentation explains the process of installing CentOS using the HTTP NetInstall method. This method is much faster for basic systems since you don't have to download 4-6 ISO files or one huge DVD based ISO just to get started. If you are installing many systems you may want to look into the stand-alone DVD as it will save time in the end.
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Last Updated on Tuesday, 16 August 2011 15:06 |
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Written by Chris Gountanis
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Beryl now known as Compiz is an OpenGL accelerated desktop that seeks to provide a free, open source desktop experience to the community that reflects the wishes of the users. Above all else, the project seeks to listen to and respond to the requests of the user base. Beryl is a combined window manager and composite manager written in C using OpenGL to provide acceleration. It is designed to be highly flexible, extensible, and portable, all the while keeping in mind that the users know how they want their desktops to act better than we do. With Beryl the rather esoteric concept of the computer desktop is brought down to a more human level, allowing for a more native and intuitive understanding of your workspace. |
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Last Updated on Tuesday, 03 June 2008 10:02 |
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Written by Chris Gountanis
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This document will explain the process of installing a fully working virtual email system on CentOS Linux using PostFix and Dovecot. I personally finalized my setup with RoundCube Webmail Project for robust online email usage. This how-to is very simple and easy to implement for beginners. |
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Last Updated on Wednesday, 24 September 2008 21:30 |
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Technical
