Tag Archive | "WAN"
WAN symptoms within Cloud type Data Centers – Why would we test something like this?
WAN symptoms in question are latency, packet loss, disconnects, bit errors, etc. usually exist on Wide Area Networks and as a result cause applications performance degradation. But our WAN’s essentially are LAN’s connected with each other and those connections impose geographical distance between those LANs, thus creating “WAN behavior”. Inside individual LANs those issues happen [...]
Continue reading...WAN Emulation vs WAN Simulation
Wednesday, December 30, 2009
One of the topics we are frequently asked is to explain or clarify the difference between WAN Emulation and WAN Simulation. WAN Simulation methodology is a set of theoretical algorithms which are usually applied on a trace file. These algorithms aim to predict applications response times with different conditions and then applied to the captured [...]
Continue reading...Improving the Quality for the End User
Monday, December 21, 2009
One student at a time… Recently, I visited a company that develops and distributes software for Independent School District’s across USA. Their main product, originally developed for challenged kids, centers around dynamic computerized teaching and testing programs. This product proved to be so successful among this population that the company adapted it for other kids [...]
Continue reading...Analyzing and remediating latency sensitive applications part 1
Thursday, August 20, 2009
Examples of latency sensitive applications In the previous post http://www.shunra.com/shunrablog/index.php/2009/08/14/data-center-relocation-questions-and-answers-part-1/ I shared some of the questions that clients typically ask me during the performance analysis service in a data center relocation project. One of the most popular question, especially at the beginning of the project is “which applications are the most sensitive to network latency?”. [...]
Continue reading...Washington Mandates Health Data Revolution
Tuesday, April 21, 2009
The recent passage of funding to address ineffienciacies in patient record creation and information transfer has created a new opportunity for pre deployment application testing. Current “paper based” systems are impracticle and expensive to maintain. Due to the enormous amount of digital data that will replace current files a systemic test methodology must be instituted [...]
Continue reading...‘Cloud Computing’ takes off in 2008
Monday, January 5, 2009
Every year about this time, CNET and various other technology sites start putting out ‘Year in Review’ articles. These articles talk about what has come and gone in technology and what the hot topics are. The one that caught my eye was Year in review: The ‘cloud’ soars. This is a subject that I personally [...]
Continue reading...Latency and Web Performance
Tuesday, December 16, 2008
The performance of web pages is an important topic for many IT managers. Speed, security, appearance, and reliability are common metrics for measuring performance. What is a mystery to many is what affects those metrics. The article, Web Performance Matters, Slowness Considered Harmful does a good job explaining key network influences on websites, common misconceptions [...]
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Monday, January 25, 2010
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