September, 2010
Automated performance degradation tests with JUnit4
There are several extension to JUnit that provide means to test performance like JUnitPerf or p-unit. But it is hard to formulate the right assertions. What if the test runs on a beefier machine or in another environment? Did performance degrade? I just want to answer a simple question: Did performance degrade? (And if, when?) [...]
Integrating MySQL and Hadoop – or – A different approach on using CSV files in MySQL
We use both MySQL and Hadoop a lot. If you utilize each system to its strengths then this is a powerful combination. One problem we are constantly facing is to make data extracted from our Hadoop cluster available in MySQL. The problem Look at this simple example: Let’s say we have a table customer: CREATE [...]