Redis-like Key Value Store in C++

A simple Redis-inspired in-memory key-value server built in C++.

The project focuses on understanding how a basic database server works internally, including networking, request handling, serialization, and hash tables.

Features

• TCP client-server communication
• Non-blocking sockets
• poll() based event loop
• Multiple client connections
• Custom binary request/response protocol
• Custom serialization and deserialization
• In-memory key-value storage
• GET, SET, and ERASE commands
• Custom hash table with separate chaining
• Dynamic hash table resizing
• Incremental rehashing
• Benchmarking with multiple concurrent clients

Benchmark Metrics

• Metrics for Single Client
• Metrics for Multiple Clients

Architecture

Client
   |
   | TCP
   ↓
Server
   |
   ↓
poll() Event Loop
   |
   ├── Read Request
   |
   ├── Deserialize
   |
   ├── Process Command
   |       |
   |       ↓
   |   Hash Table
   |
   ├── Create Response
   |
   └── Write Response