Two years ago Terark DB was announced and on their benchmark, they were 200x faster than Rocks DB. But now their website does not answer and most Github commits are from 2017. Did they officially quit?

See:

https://technode.com/2017/07/03/how-chinese-company-terark-can-make-your-database-200x-faster/

https://github.com/Terark/terarkdb

http://www.terark.com/