Is anyone aware of an in-depth explanation about how key-value store persistence, such as Redis RDB, is built? A guide on compaction would be really interesting and useful.
Highly recommending Martin Kleppmanns „Designing Data-Intensive Applications“ book (O‘Reilly). Covers virtually any topic around database implementation. Well written, big source of knowledge. Introduces concepts gradually and with many examples. Lots of references to actual software out there, and how they are done.
KV persistence is covered in Chapter 3, right from the start. Redis is also mentioned as an example for an in-memory store with „weak durability by writing to disk asynchronously“.
