MBA
Get flash to fully experience Pearltrees
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Martinelli-Waddel-5-07.pdf (application/pdf Object)
Google Maps, Yahoo! Mail, Facebook, MySpace, YouTube, and Amazon are examples of Web sites built to scale. They access petabytes of data sending terabits per second to millions of users worldwide. The magnitude is awe-inspiring. Users view these large-scale Web sites from a narrower perspective.
A Conversation with Werner Vogels - ACM Queue
Amazon.com - Wikipedia, the free encyclopedia
A2Z Development, A9.com , Alexa Internet , Amazon.com, Amazon Kindle , Amazon Studios, Amazon Web Services , Audible.com , Endless.com , IMDb , LoveFilm , Zappos.com , Woot , Junglee.com US$ 0 48 billion (2011) [ 1 ] US$ 0 862 million (2011) [ 1 ] US$ 0 631 million (2011) [ 1 ] US$ 25.2 billion (2011) [ 1 ] US$ 0 7.75 billion (2011) [ 1 ]
This is a cross-post from my personal blog . Few weeks ago I asked a question on quora about log aggregation . I was surprised to find that no opensource solution came close to what I wanted, but I got a lot of suggessions to try out splunk. So I did. What I wanted was an aggregation tool which collects, displays and alerts based on events logged by the various webservers across the network which could be in different datacenters.
Scalable web architectures
SOAP , originally defined as Simple Object Access Protocol , is a protocol specification for exchanging structured information in the implementation of Web Services in computer networks . It relies on Extensible Markup Language (XML) for its message format, and usually relies on other Application Layer protocols, most notably Hypertext Transfer Protocol (HTTP) and Simple Mail Transfer Protocol (SMTP), for message negotiation and transmission. SOAP can form the foundation layer of a web services protocol stack , providing a basic messaging framework upon which web services can be built. This XML based protocol consists of three parts: an envelope, which defines what is in the message and how to process it, a set of encoding rules for expressing instances of application-defined datatypes, and a convention for representing procedure calls and responses.
SOAP - Wikipedia, the free encyclopedia
The Systems development life cycle (SDLC) , or Software development process in systems engineering , information systems and software engineering , is a process of creating or altering information systems, and the models and methodologies that people use to develop these systems. In software engineering, the SDLC concept underpins many kinds of software development methodologies . These methodologies form the framework for planning and controlling the creation of an information system [ 1 ] : the software development process . [ edit ] Overview The SDLC is a process used by a systems analyst to develop an information system , training, and user (stakeholder) ownership.
Systems Development Life Cycle - Wikipedia, the free encyclopedi
Software Applications come in all shapes and sizes. Based on their design and architecture enterprise applications can be classified into various categories such as: This helps us speed up the Design and overall Development Time and Effort thereby resulting in cost savings. At the same time since these patterns are time tested they provide solutions with known benefits and drawbacks. Over a period of time patterns get improvised and new patterns emerge.
Software Architecture & Design Patterns
This tutorial discusses the first fundamental principle of object oriented programming which is the encapsulation of information and functionality. Inheritance and polymorphism will be examined in the next tutorial . Encapsulation Encapsulation is the ability of an object to be a container (or capsule) for related properties (ie. data variables) and methods (ie. functions). Older languages did not enforce any property/method relationships.
Java Tutorial 4 - Encapsulation and Classes
Creational Patterns - Factory Pattern Factory of what? Of classes. In simple words, if we have a super class and n sub-classes, and based on data provided, we have to return the object of one of the sub-classes, we use a factory pattern. Let’s take an example to understand this pattern. Example: Let’s suppose an application asks for entering the name and sex of a person.
JAVA DESIGN PATTERNS, Creational Patterns - Factory Pattern
