Redis From Scratch in c++

this project contains:

• tcp server using socket programming.
• async io and event loop.
• a parser to parse commmands.
• key value in memory database.
• a command line tool to interact with the server.

The Protocol

Overview

the protocal uses tcp and listens on port 6379 by default.

Message Structure

request:

+-----+---------+
| len | payload |
+-----+---------+

len: 32bit unsigned int payload: string

response:

+--------+-----+---------+
| status | len | payload |
+--------+-----+---------+

status: 16bit unsigned int len: 32bit unsigned int payload: string

References

• https://redis.io/docs/latest/develop/reference/protocol-spec/
• https://www.ibm.com/docs/en/i/7.4?topic=designs-using-poll-instead-select