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R package for the Universal Scalability Law

I am pleased to announce the general availability of my usl package for R on CRAN. The package is useful for creating models according to the Universal Scalability Law, which is used to quantify the scalability of hardware or software systems. It uses measurements from an existing system to predict the throughput for different loads and can be used to learn more about the scalability limitations of the system.

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Visualize database storage with a treemap

Treemaps are a nice way to visualize hierarchical data and they were actually invented to show the used space on a hard disk. I needed to present the storage usage of a database and the treemap seemed to be the natural choice. The following paragraphs show my approach to generate a treemap for the storage usage of a PostgreSQL database.

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