UCSD🔱 CSE224 Spring 2025 Quarter

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Welcome to the UCSD CSE224: Network Services course repository for Spring 2025! This repository contains all nine labs completed during the course, covering Go concurrency, network services, and distributed systems development. Explore each lab-* directory for detailed implementations and instructions.

🎉 Lab 1: Go Introduction & Project Setup

• Introduction to Go modules, package management, and basic syntax
• Scaffolded the project structure and wrote the first main.go CLI tool
• Learned go build, go run, and go test commands

🏃‍♂️ Lab 2: Concurrency Basics

• Deep dive into goroutines and channels
• Implemented the producer-consumer pattern and built concurrent pipelines
• Explored buffered vs. unbuffered channels and blocking behavior

🔒 Lab 3: Synchronization & Race Conditions

• Used sync.Mutex, sync.WaitGroup, and atomic operations for safe concurrency
• Detected race conditions with go run -race
• Built a concurrent counter and protected shared data structures

🌐 Lab 4: Rate-Limited FTP Service

• Built an FTP server and client using the net package, supporting STOR and RETR
• Added optional download rate limiting to control bandwidth

🚀 Lab 5: gRPC & Protocol Buffers

• Developed gRPC clients and servers in Go, defining services in .proto files
• Generated Go code from Protocol Buffers and implemented RPC handlers
• Learned about HTTP/2 and flow control in gRPC

🔄 Lab 6: HTTP Server & RESTful API

• Created a RESTful API with the net/http package, handling JSON encoding/decoding
• Implemented routing, middleware, and basic authentication
• Explored HTTP/2 support and request context usage

📊 Lab 7: Middleware & Logging

• Built custom middleware for request logging, performance monitoring, and rate limiting
• Integrated context for propagating metadata
• Monitored key metrics such as response time and throughput

🌎 Lab 8: Distributed File Storage

• Implemented RemoveNode RPC to migrate files when nodes join or leave
• Used consistent hashing to distribute files across nodes without global locks
• Ensured file consistency and single-copy guarantees per lab specifications

🔑 Lab 9: etcd & Cluster Interaction

• Interacted with an etcd cluster using etcdctl, learning distributed key-value storage
• Analyzed leader election and node state transitions
• Deployed nodes on AWS, observed IP changes, and studied election behaviors

Feel free to clone this repository and dive into each lab for more details. Enjoy! 🎓