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Even SQLite had a version 4 based on LSM trees (https://sqlite.org/src4/doc/trunk/www/design.wiki https://sqlite.org/src4/doc/trunk/www/design.wiki), but it was
by atesti 9y ago
Even SQLite had a version 4 based on LSM trees (https://sqlite.org/src4/doc/trunk/www/design.wiki https://sqlite.org/src4/doc/trunk/www/design.wiki), but it was recently stopped:
https://news.ycombinator.com/item?id=15648280 https://news.ycombinator.com/item?id=15648280