v0.1.1 Boundary Burst

What's New

• Rate Limiter — Atomic sliding window rate limiting with Redis Lua script
• Non-atomic variant — Demonstrates the race condition (ZCARD/ZADD gap)
• Modular Sinatra controllers — ReportsController, RateLimitController
• sinatra-activerecord — Rake tasks for DB management
• RSpec specs — Unit/integration tests for all components
• System tests — Interactive bash scripts with progress output
• CI — GitHub Actions (rubocop + rspec)

Blog

Boundary Burst: The Rate Limit Problem Nobody Catches

Full Changelog: v0.1.0...v0.1.1

v0.1.0 Thundering

Markdown# Ruby at Scale v0.1.0 "Thundering"

First public release.

This initial version introduces the Cache Stampede (Thundering Herd) challenge.
It is of the most common performance killers in high-traffic Ruby applications.

What's included:

• Cache Stampede problem + test harness
• Solution
• Redis + PostgreSQL setup
• System test

Start learning how to handle real production-scale problems.

Next up: Rate Limiting challenge.

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Try it:

bin/setup
bin/server
test/ruby_at_scale/cache_stampede_test