Ajax file upload using ASP.Net MVC

http://www.dustinhorne.com/post/2011/11/16/AJAX-File-Uploads-with-jQuery-and-MVC-3.aspx

www.dustinhorne.com/files/AjaxFileUploadDemo.zip

http://powerdotnetcore.com/asp-net-mvc/asp-net-mvc-simple-ajax-file-upload-using-jquery

What is Hadoop

Hadoop is a free, Java-based programming framework that supports the processing of large data sets in a distributed computing environment. It is part of the Apache project sponsored by the Apache Software Foundation

what is MapReduce

MapReduce is a software framework that allows developers to write programs that process massive amounts of unstructured data in parallel across a distributed cluster of processors or stand-alone computers.
It was developed at Google for indexing Web pages

WPF Windows Presentation Foundation

Windows Presentation Foundation (WPF) is a next-generation presentation system for building Windows client applications with visually stunning user experiences. With WPF, you can create a wide range of both standalone and browser-hosted applications
The core of WPF is a resolution-independent and vector-based rendering engine that is built to take advantage of modern graphics hardware.

WPF exists as a subset of .NET Framework types that are for the most part located in the System.Windows namespace. If you have previously built applications with .NET Framework using managed technologies like ASP.NET and Windows Forms, the fundamental WPF programming experience should be familiar; you instantiate classes, set properties, call methods, and handle events, all using your favorite .NET Framework programming language, such as C# or Visual Basic.

To support some of the more powerful WPF capabilities and to simplify the programming experience, WPF includes additional programming constructs that enhance properties and events: dependency properties and routed events


Good stuff on WPF is here for beginners : http://www.wpftutorial.net/WPFIntroduction.html

Difference between Cloud Computing and SaaS

Cloud computing :- Cloud Computing is a computing infrastructure that you can rent to deploy your applications without worrying about hardware .


SaaS:- SaaS offerings are complete end user software applications which you can use by paying hourly basis instead of licensing for years.

Improving the ASP.Net application performance

Few points to keep in mind while developing and deploying ASP.Net application.

Create new application pool for your site and ensure that only your application uses this pool.

In machine.config file , set the “retail=true” which will set the debug and tracing options to false . Disabling debug and tracing features for production application will improve the performance.

Implement Ajax wherever possible, this will reduce the full page refresh and increases the application performance by refreshing the parts of the page.

Implement Client side validations instead of using server validation controls. This will decrease the round trips to the server.

Disable the view state for entire page when not needed. Using view state simply will become overhead for webpage and it impacts the page load time.

Don’t store larger amounts of data in sessions . Using sessions will increase the memory consumption at server and brings down the server performance.

Use try/catch/finally blocks only when you are implementing complex functions . Use of exception handling for every simple function will hit the performance.