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Mongo Scaling Demo ================== This is a sample algorithm to demonstrate one way to create an algorithm that: * scales horizontally * is ephemeral * uses MongoDB as a persistent data store This demo was created to suppliment the talk "Designing Algorithms That Scale Horizontally With MongoDB", presented at MongoRaleigh and MongoDallas. GETTING STARTED: ================ 1. Launch MongoDB locally. 2. Run "bundle install" (after installing ruby, rubygems, and the bundler gem) 3. Run "ruby consumer.rb" in a terminal 4. Run "ruby replayer.rb 10" in another terminal (10 can be changed. It's the number of weather samples to be written per second. Increase this and the number of consumers you run to see how the consumer algorithm scales with increased load) 5. Run as many consumers in seprate terminals as you want. You can create and destroy consumer processes at will. This demonstrates the ephemeral nature of this algorithm, and you can also see that as you scale it up, each consumer does less work.
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