alternative embedded database extremedb sqlite influxdb redis raima database manager

 https://www.g2.com/products/ittia-db-sql-embedded-database/competitors/alternatives

 https://www.trustradius.com/embedded-database

 https://stackoverflow.com/questions/2011724/whats-the-best-database-for-embedded

https://objectbox.io/sqlite-alternatives/ 

https://en.wikipedia.org/wiki/Embedded_database

https://greenrobot.org/news/mobile-databases-sqlite-alternatives-and-nosql-for-android-and-ios/

database types NoSQL  Relational  Distributed  Object-oriented Graph Key-value Trees

 https://dataintensive.net/

https://dbfromzero.com/log_structured_merge_tree.html

 https://hbase.apache.org/book.html#arch.overview

https://blog.bytebytego.com/p/ep58-10-key-data-structures-we-use

https://blog.bytebytego.com/p/8-data-structures-that-power-your

database types  Data Structure   hash R-TREEs

LIST R-TREEs  SSTable LSM tree Suffix tree Log-Structured Merge tree