Martinelli-Waddel-5-07.pdf (application/pdf Object) A Conversation with Werner Vogels. Related Content High Performance Web Sites 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. Improving Performance on the Internet When it comes to achieving performance, reliability, and scalability for commercial-grade Web applications, where is the biggest bottleneck? Browse this Topic: Favorite Tweets by @ACMQueue Queue on Reddit A Conversation with Werner Vogels Learning from the Amazon technology platform Many think of Amazon as “that hugely successful online bookstore.” Vogels came to Amazon from Cornell University, where he was working on high-availability systems and the management of scalable enterprise systems. Interviewing Vogels is ACM Turing Award winner and Microsoft Technical Fellow Jim Gray. JIM GRAY How has Amazon’s technology evolved over the past five years?
WV Possibly. JG What about tools? Amazon.com. Amazon has separate retail websites for the United States, the United Kingdom and Ireland, France, Canada, Germany, Italy, Spain, Netherlands, Australia, Brazil, Japan, China, India and Mexico.
Amazon also offers international shipping to certain other countries for some of its products. In 2016, Dutch and Polish language versions of the German Amazon website were launched. In 2015, Amazon surpassed Walmart as the most valuable retailer in the United States by market capitalization, and is, as of 2016 Q3, the fourth most valuable public company. History The company was founded in 1994, spurred by what Amazon founder Jeff Bezos called his "regret minimization framework," which described his efforts to fend off any regrets for not participating sooner in the Internet business boom during that time. In 1994, Bezos left his employment as vice-president of D. E. SOAP. Systems Development Life Cycle - Wikipedia, the free encyclopedi. Model of the systems development life cycle, highlighting the maintenance phase.
The systems development life cycle (SDLC), also referred to as the application development life-cycle, is a term used in systems engineering, information systems and software engineering to describe a process for planning, creating, testing, and deploying an information system. The systems development life-cycle concept applies to a range of hardware and software configurations, as a system can be composed of hardware only, software only, or a combination of both. Overview A systems development life cycle is composed of a number of clearly defined and distinct work phases which are used by systems engineers and systems developers to plan for, design, build, test, and deliver information systems. In project management a project can be defined both with a project life cycle (PLC) and an SDLC, during which slightly different activities occur.
History Phases Describe the costs and benefits. Scalable Internet Architectures Presentation 2.pdf (application/ Software Architecture & Design Patterns. Software Architecture & Design Patterns This article reviews some of the architecture Design patterns for Enterprise Applications built using the .NET Platform.
Application Architecture: Software Applications come in all shapes and sizes. Based on their design and architecture enterprise applications can be classified into various categories such as: * Distributed Applications * Web Applications * Web Services * Smart Client Applications Simply put Application architecture is: Java Tutorial 4 - Encapsulation and Classes. This tutorial discusses the second and third fundamental object oriented programming principles of inheritance and polymorphism.
The first fundamental principle, encapsulation, was discussed in the previous tutorial. Inheritance Inheritance is the capability of a class to use the properties and methods of another class while adding its own functionality. An example of where this could be useful is with an employee records system. You could create a generic employee class with states and actions that are common to all employees. The Object class is the highest superclass (ie. root class) of Java. Java uses the extends keyword to set the relationship between a parent class and a child class. Public class GraphicsBox extends Box The GraphicsBox class assumes or inherits all the properties of the Box class and can now add its own properties and methods as well as override existing methods.
Abstract Classes Abstract methods are methods with no body specification. Interfaces Polymorphism. JAVA DESIGN PATTERNS, Creational Patterns - Factory Pattern. 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.
The skeleton of the code can be given here. Web Services Architecture. B An Overview of Web Services Security Technologies (Non-Normative) This section attempts to provide a non-exhaustive description of current available work around Web services security relevant to the requirements and solutions presented in 3.6 Web Services Security. Note that although these technologies build on existing security technologies, they are relatively new and need to be fully tested in actual deployment scenarios. B.1 XML-Signature and XML-Encryption XML signatures are designed for use in XML transactions. It is a standard that was jointly developed by W3C and the IETF (RFC 2807, RFC 3275). XML Signature has the ability to sign only specific portions of the XML tree rather than the complete document. XML Encryption specifies a process for encrypting data and representing the result in XML.
B.2 Web Services Security The work provides a general mechanism for associating security tokens with messages. B.3 XML Key Management Specification (XKMS) 2.0 B.6 Identity Federation.