Redis built from scratch in Go.

• GET
• SET (with TTL)
• PING
• ECHO
• KEYS (only * pattern)
• TYPE

• XADD - Add entries to a stream
• XRANGE - Get range of entries (inclusive of start/end IDs)
• XREAD - Read entries newer than given ID, blocking available.

• MULTI - Start a transaction
• EXEC - Execute a transaction
• DISCARD - Discard a transaction
• WATCH - Watch keys for changes (optimistic locking) (CAS)
• UNWATCH - Stop watching keys

• Full RESP V2 (Redis Serialization Protocol) support
• Handles RESP data types:
  • Simple Strings
  • Errors
  • Integers
  • Bulk Strings
  • Arrays

• Supports multiple concurrent clients using go-routines
• Thread-safe operations with mutex locks

• RDB file support (read-only, no RDB file saving/creation)
• Automatic loading of RDB files on startup

To clone and run locally, follow these steps:

1. Clone the repository:

   git clone https://github.com/yourusername/Redis-From-Scratch.git
   cd Redis-From-Scratch

2. Initialize Go Modules:

   go mod init github.com/manish-singh-bisht/Redis-From-Scratch
   go mod tidy

3. Build and run

   go build -o rds
   ./rds

1. Use any Redis client to connect to the server on the port 9379.
2. Using redis-cli, connect using redis-cli -p 9379
3. Run the supported commands mentioned above.

# Start redis-cli
redis-cli

# Basic key-value operations
1. SET mykey "Hello World"
2. GET mykey
3. SET mykey-with-ttl "I will expire" EX 10  # Expires in 10 seconds
4. KEYS *  # List all keys
5. TYPE mykey  # Get type of key

# Simple commands
6. PING  # Returns PONG
7. ECHO "Hello"  # Returns Hello

# Add entries to a stream
1. XADD mystream * name "John" age "25"  # Auto-generated ID

# Read from stream
2. XRANGE mystream - +  # Read all entries

# Read new entries
3. XREAD STREAMS mystream $  # Read entries newer than last seen
4. XREAD BLOCK 3000 STREAMS mystream $  # Block for 3 seconds waiting for new entries

# Basic transaction
1. MULTI  # Start transaction
SET user:1 "John"
SET user:2 "Jane"
2. EXEC  # Execute transaction

# Transaction with optimistic locking
3. WATCH user:1  # Watch for changes
MULTI
SET user:1 "John Doe"
EXEC  # Will fail if user:1 was modified by another client

We'd love your help! Here's a simple guide to contributing:

1. Fork & Clone
2. Create a Branch
3. Make Your Changes
4. Open a Pull Request