3 ms·

I dunno how widely used it is, but there is Kdb+[1], “a column-based relational time-series database” built on the K[2] language, a descendant of APL. I mainly

I dunno how widely used it is, but there is Kdb+[1], “a column-based relational time-series database” built on the K[2] language, a descendant of APL. I mainly see J[3] used for code golf, but at least that means a decent number of people know it. [1]: https://en.wikipedia.org/wiki/Kdb%2B https://en.wikipedia.org/wiki/Kdb%2B [2]: https://en.wikipedia.org/wiki/K_(programming_language) https://en.wikipedia.org/wiki/K_(programming_language) [3]: https://en.wikipedia.org/wiki/J_(programming_language) https://en.wikipedia.org/wiki/J_(programming_language)

RyanHamilton 10y ago
kdb is great, basically it combines an APL like language and a database, which is very cool as you can easily push your calculations to where your data lives: http://www.timestored.com/kdb-guides/kdb-database-intro http://www.timestored.com/kdb-guides/kdb-database-intro If you want to dive in and try it, I've also made a video tutorial here: http://www.timestored.com/kdb-guides/getting-started-kdb http://www.timestored.com/kdb-guides/getting-started-kdb Even if you don't use it, it's an interesting language to study as it's significantly different to the common java/python etc. The one drawback is that for commercial use it's very expensive. Other "modern" APL like languages that are available free include J and kona (open source K).
alfalfasprout 10y ago
Kdb+ is incredible. It blows away any of the current attempts at time series data stores out there (eg; InfluxDB, OpenTSDB). Unfortunately, Kx Systems failed to allow it to reach mass popularity by keeping licenses extremely expensive. Startups simply can't afford to outlay $100k+/year for a tiny cluster.
- avmich 10y ago
  I wonder if anybody compared Kdb+ with Jdb, a J DB system.
  - throwaway7645 10y ago
    I tried googling this awhile back. I assume kdb+ is closed source?

RyanHamilton 10y ago

kdb is great, basically it combines an APL like language and a database, which is very cool as you can easily push your calculations to where your data lives: http://www.timestored.com/kdb-guides/kdb-database-intro http://www.timestored.com/kdb-guides/kdb-database-intro If you want to dive in and try it, I've also made a video tutorial here: http://www.timestored.com/kdb-guides/getting-started-kdb http://www.timestored.com/kdb-guides/getting-started-kdb Even if you don't use it, it's an interesting language to study as it's significantly different to the common java/python etc. The one drawback is that for commercial use it's very expensive. Other "modern" APL like languages that are available free include J and kona (open source K).

alfalfasprout 10y ago

Kdb+ is incredible. It blows away any of the current attempts at time series data stores out there (eg; InfluxDB, OpenTSDB). Unfortunately, Kx Systems failed to allow it to reach mass popularity by keeping licenses extremely expensive. Startups simply can't afford to outlay $100k+/year for a tiny cluster.

avmich 10y ago
I wonder if anybody compared Kdb+ with Jdb, a J DB system.
- throwaway7645 10y ago
  I tried googling this awhile back. I assume kdb+ is closed source?