FloDB

FloDB is a LSM memory component architecture which allows throughput to scale on modern multicore machines with ample memory sizes. The main idea underlying FloDB is essentially to bootstrap the traditional LSM architecture by adding a small in-memory buffer layer on top of the memory component. This buffer offers low-latency operations, masking the write latency of the sorted memory component. Integrating this buffer in the classic LSM memory component to obtain FloDB is not trivial and requires revisiting the algorithms of the user-facing LSM operations (search, update, scan). FloDB's two layers can be implemented with state-of-the-art, highly-concurrent data structures. This way, as we show in the paper, FloDB eliminates significant synchronization bottlenecks in classic LSM designs, while offering a rich LSM API.

• O. Balmau, R. Guerraoui, V. Trigonakis, and I. Zablotchi. FloDB: Unlocking Memory in Persistent Key-Value Stores. In Proceedings of the 11th European Conference on Computer Systems (EuroSys '17).

* FloDB: code