The journey to today's version of QuestDB began with the original prototype in 2013, and we've described what happened since in a post published during our HN launch last year. In the early stages of the project, we were inspired by vector-based append-only systems like kdb+ because of the advantages of speed and the simple code path this model brings. We also required that row timestamps were stored in ascending order, resulting in fast time series queries without an expensive index.
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A few weeks ago, I posted the story of how I started QuestDB on Hacker News. Several people found the story interesting, so I thought I would post it here and describe the passage from working at a large energy trading company, discovering memory-mapping approaches in Java, the beginnings of building the system as a side-project, and how we got to where we are today with companies relying on production instances of our time-series database.
If you listen to, well, pretty much anyone rational, they will tell you in no uncertain terms that the last thing you ever want to do is put your SQL Database on the public internet. Even if you're crazy enough to do that, you certainly should never post the address to it on a place like Hacker News. We did it anyway, and this post describes why we did it, what we learned and what people tried to do with it.