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Based on our record, MapDB seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
In Java I like https://mapdb.org/ It is more feature rich than you want but in Python I'd probably just use sqlite3 since it is in the standard library. - Source: Hacker News / about 3 years ago
MySQL - The world's most popular open source database
RocksDB - A persistent key-value store for fast storage environments
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
SQLite - SQLite Home Page
Oracle Database 12c - Simplify database management and automate the information lifecycle with maximum security.