Recent Posts
Blending project and result for a unified graph
Most high scale performance engagements require a blend of sound project management processes and deep analytical profiling of system logs. Many customers do not anticipate the level of preparation an... Read More
Time series overlay of cluster fault injection testing
Fault injection at scale is one of the more challenging performance testing scenarios that we’re asked to tackle. Not only are we dealing with deploying high scale workload simulations on comple... Read More
WSJ – Making Data Beautiful
An interesting article on the blending of art and the data sciences. http://online.wsj.com/article/SB10001424052702303299604577323743008395060.html At companies and universities, and far beyond, the g... Read More
DIY surface skimmer on AC70
I’ve been quite happy with the low maintenance filtration solution I implemented for my 33L. Two AC70’s with AC30 impellers, dual sponges and extra biomax have provided a stable, huge me... Read More
Time series view of application performance metrics
This post builds off a previous post on the evolution of a second order metric, using the metric developed there as a basis for more advanced visualizations illustrating interactions between multiple ... Read More
Time series analysis of workload isolation strategies
By now you have figured out that I really like time series plots of transactional data with log scale latencies as a visual representation of workloads. Taking this a step further, we can overlay colo... Read More
Troubleshooting system performance with time series scatter plots
The use of time series scatter plots can provide far more insight into system performance when compared to using typical average latencies and cumulative throughput rates. These scatter plots a... Read More
Stack metrics for analyzing system performance
Stack over lays of time series data System performance testing relies (or should rely) on the aggregation of large amounts of data from a variety of sources within the supporting infrastructure. It... Read More
Good old Big O
Big Oscar is a good mutt. He’ll even tolerate dress up.... Read More
Comparing software release performance data
One challenge we face in summarizing end of release performance findings is how do you effectively illustrate release to release performance in a concise visual manner? One method I have been experime... Read More
Tonja hates bugs
No words needed for this sequence.... Read More
multiple Airport AP’s; improving coverage
I’ve been a proponent of using separate devices for wireless home access and general purpose firewall/networking. I’ve deployed a VPN/firewall and a 24 port gigabit green switch as the f... Read More
home storage with FreeNAS
I’d been searching for a centralized storage solution on and off for a few years, but I finally got serious about it in the Summer of 2010. While searching around, I came across FreeNAS (http:... Read More