Why did I build this?

• I was really curious about how Go handles concurrency, and how a scalable application/server is ideally written in Go.
• I researched a little and came across Redis as a prime example to learn about GoRoutines, Channels and the concept of concurrency.

👉 What's better than building a project to learn more about a language?

So here I am, writing as I build a Go Redis (key-value) database.

Learnings

I will update this as I make progress in my project

Day 1

• Built the server and RESP protocol parser
  • Concurrent client request reading (achieved using GoRoutines and Channels)
  • Accepting peer connection and handling disconnection
  • Reading client input while avoiding buffer leaks
  • Understood the RESP protocol and implemented the parser
  • Understood the need of single threaded command execution in Redis (achieved using Channels)

Day 2

• Added support for PING, SET, GET, HSET, HGET, HGETALL
  • Use of sync.RWMutex locks for:
    • Only 1 writer at a time
    • Multiple readers at a time
    • Readers can't read during writes
    • Writers can't write during reads
  • Made it Redis-client compliant
  • Building response to Redis-clients using RESP
  • Handling exceptions properly and reverting to client
  • Use of maps (hashmaps) in Go