Very interesting, but can anyone explain the underlying technology?
There are no free lunches.
Here we have sql join on time series data. Very cool, but is it really sustainable?
Under the hood is a stack written from scratch without any dependencies - all libraries have been rewritten. It's in boring Java (zero-GC) and C++ for high performance components such as SIMD instructions. The idea being to provide massive performance and accessibility through SQL. IoT/monitoring being one of the use cases that work particularly well for questdb