BoJack

View Current Viewing Revision #17 from 12/10/2019 11:58 a.m.

BoJack is a single-node key-value store written in Crystal, largely inspired by Redis.

History

This DBMS was started by Marcelo Boeira in 2016 as a learning vehicle for understanding the development of NoSQL database systems, such as Redis. Originally written for Crystal, it has since been built out to additionally support Python, Ruby, and Elixir with help from Mauricio Antunes, Hugo Abonizio, and Vitalii Elenhaupt. Its last commit was made in early 2018, and Boeira has since archived the Github repository.

Logging

Command Logging

Bojack logs, in addition to errors, individual commands for any client action, along with the date and time of interaction, and the client's address and port.

This includes anytime a client connects, or a key is set, updated, or deleted.

Indexes

Not Supported

Foreign Keys

Not Supported

As BoJack is a key-value store, SQL joins are not supported.

Storage Model

Custom

BoJack uses Crystal's default in-memory hash table to store its data as key-value pairs.

Views

Not Supported

Data Model

Key/Value

BoJack's data model relies on a key/value store which maps string keys to string array values.

BoJack does not provide any kind of concurrency control. Concurrent client requests are handled by the Crystal language's concurrent Channel class, which is an abstraction of threads.