Tag Archive | "Web Performance"
Application Performance Engineering and SLAs
The following article by Jim Metzler covers the value in setting SLAs between IT and the business units that it serves. It does a nice job at mapping the role of SLAs to the application performance engineering process. What resonated well with me was a quote from Jim taken from “Alice in Wonderland” – “If [...]
Continue reading...Getting Accurate Results from Scalability Testing
Thursday, October 21, 2010
None of us want our sites to crash like the Chase site outage in mid September. I’m not privy to the details of that site crash, but I can tell you that many sites degrade under peak user traffic unexpectedly and eventually crash. Why? It’s often incorrectly performed scalability tests. Over the years, I’ve met [...]
Continue reading...Netflix Survey Hints at Iphone Streaming App
Friday, March 5, 2010
Despite Netflix’s CEO comments in a recent interview to Reuters, it is apparent that the online/rental primer distributor of movies in the US is planning to release a new service targeting, yes, you guessed correctly… millions of Iphone users. Netflix is distributing among thousands of its subscribers an online survey (see below) to float the [...]
Continue reading...Is Apple’s IPAD a Game Changer?
Wednesday, February 10, 2010
Since Steve Jobs presented Apple’s new addition, the IPAD, the press and the blogosphere are trying to assess the real impact on the new gadget. Is it a passing fad, like the Newton or the attempts by IBM to implement a tablet computer or a real game changer that finally, after almost 30 of personal [...]
Continue reading...Testing 3G Hand Held Inventory Devices using Shunra Virtual Enterprise (VE) Suite
Monday, February 8, 2010
I was approached a couple of days ago by one of our large customers, a major food manufacturer, to help them design a testing cycle for an hand-held device, to scan barcodes on their product’s pallets, as they are being unloaded from supply trucks into their regional depots. The devices utilize a LAN based wireless [...]
Continue reading...WAN symptoms within Cloud type Data Centers – Why would we test something like this?
Monday, January 25, 2010
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...Is Making the Transition to IPv6 Really Necessary In The Near Future?
Friday, January 22, 2010
With the exponential growth of the Internet since the mid 90s, IP address space depletion has increasingly become a pressing concern. The reason that this issue has become more of a concern now than before is that the number of devices that can access the Internet has significantly expanded as compared to 10 years ago; [...]
Continue reading...Is the Internet in the United States slowing down?
Thursday, January 21, 2010
A post found today in Mashable, a blog focusing on social technology, reports that the Internet in the US is showing signs of slowing down, as measured by Aramaic, the global content provider. The performance in Q3 was bad enough to displace the US from the 10 top countries with fastest Internet access in the [...]
Continue reading...Why Has MPLS Become So Pervasive on Today’s Global Networks?
Monday, December 28, 2009
Many of the largest networks today employ Multi-Protocol Label Switching (MPLS) for a myriad of reasons. So what are some of the key motivators that would entice an organization to make the leap to MPLS? Protocol neutrality, extensibility, adaptability and scalability are among some of the many reasons. Additionally, because MPLS was designed to openly [...]
Continue reading...A Data Driven Transactional Application A glossary post
Thursday, November 5, 2009
A data driven transactional application supports the execution of business processes. Each business process (such as book sale, update employee status, submit work hours, etc.) is comprised of multiple business transactions. A business transaction is described as the interaction and managed outcome of a well-defined step within a business process. A transaction is usually triggered [...]
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Tuesday, February 1, 2011
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