Tag Archive | "Latency"
Data Center Relocation Questions and Answers Part 1
In my line of work, I get to assist many clients with analyzing the impact of an upcoming data center relocation on the performance of business applications. Many clients don’t know exactly what application performance to expect post the data center move. The main concern is that once all the applications start to operate across [...]
Continue reading...Business Process Performance Monitoring – A WAN Emulation Solution
Friday, July 10, 2009
Recently I was brainstorming with an insurance company for ways we could help them reduce their costs for business process (application) performance monitoring by introducing WAN emulation into their environment. The problem was that they had thousands of locations accessing a wide variety (250+) applications. Being an insurance company, most of the applications really were [...]
Continue reading...Jitter – a glossary post
Thursday, June 25, 2009
Jitter: Network jitter is the variation in the arrival rate of packets (more specifically, the inter packet gap of subsequent data packets as they arrive over a network). For most types of data applications large gap variations between arrival times (high jitter) are acceptable. For voice or video applications, relatively small jitter can cause perceptible [...]
Continue reading...Network Latency
Thursday, June 25, 2009
In the next couple of posts I will add some glossary definitions that I see repeat in reader’s questions. I will also use these as I describe some of the performance analysis insights we experience in the field. Network Latency/Network Delay One-way network latency is defined as the amount of time it takes for a [...]
Continue reading...What’s new in LoadRunner 9.5 – the rest of the story
Wednesday, March 25, 2009
One of my favorite partners to work with is LoadTester. Not only are they competent and efficient, but they are nice and will tell you what they really think. Their latest update on HP’s latest release of LoadRunner 9.5 goes into a lot more detail than any readme file will, with perspective and colorful commentary [...]
Continue reading...VE Desktop for HP Software 5.0 versus LoadRunner MWE
Friday, March 6, 2009
Earlier this week, Shunra announced the release of a new product, VE Desktop for HP Software 5.0. This product is embedded into HP’s LoadRunner 9.5 and Performance Center 9.5 products and from the surface, looks a lot like a previous feature in LoadRunner called Mercury WAN Emulation (MWE). Because of the obvious similarities, there have [...]
Continue reading...Adding Network Conditions to a QTP Script – Part 1
Monday, March 2, 2009
Quick Test Pro (QTP) is a very useful functional testing tool and now as a result of the Shunra-HP partnership, QTP can integrate with Shunra VE Desktop Professional to automate the testing and analysis of applications under network conditions. In the following series of posts I will walk you through the process of extending QTP scripts [...]
Continue reading...Calling all Application Delivery Engineers
Wednesday, January 21, 2009
Whether you’re developing applications or delivering applications, understanding how they will perform over the real world WAN is critical to your success.
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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Friday, August 14, 2009
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