redis-clone (WORK IN PROGRESS)

Building the Redis in-memory database with distributed caching to gain a deeper understanding of Redis technology and distributed systems.

Features

• RESP (Redis Serialization Protocol) parsing and serialization for client-server communication.
• In-memory key-value store supporting:
  • Simple string keys (SET, GET)
  • Hash maps (HSET, HGET, HGETALL)
• Concurrency-safe database access using mutexes.
• Append-Only File (AOF) persistence for durability and recovery.
• Snapshotting to JSON files for fast backup and restoration.
• Automatic periodic backups (auto-backup) in the background.
• Command handlers for core Redis-like commands.
• Compatible with redis-cli for testing.
• Modular code structure for extensibility.
• Graceful handling of malformed or invalid commands.

How to start

1. In an terminal, type go run ., this will start the net/http server to listen to requests and accept commands.
2. Go to a separate terminal and type 'redis-cli' to enter the command line interface for redis. You should see an ip address as the prompt.

Commands

1. PING -> Returns PONG, typically used to test connections.
2. SET [key] [value] -> Returns OK, used to set key value pairs. Data type: map[string]string{}.
3. GET [key] -> Returns Value, used to find the value for specific keys.
4. HSET [hash] [key] [value] -> Returns OK, typically used to set nested hashmap values. Data type: map[string]map[string]string.
5. HGET [hash] [key] -> Returns Value, typically used to obtain values inside nested hashmaps.
6. HGETALL [hash] -> Returns Value, typically used to list ALL key and values inside a specific hash.
7. SNAPSHOT [fileName] -> Saves the current data into a data persistent storage in a file named [filename], this is used as a backup of current data or quick restoration(not implemented yet) after database restart.

Currently Developing

1. Distributed Caching 2. Quick restoration