Scaling Python - Speaker Deck

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SCALING PYTHON James King @agentultra

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• CPython • Openstack • Firefox • WebGL • Many, many more…

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–Johnny Know-It-All “Dynamic languages do not scale to programming-in-the- large”

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–Super Enterprise Hacker “Scripting languages are great for toys, one-off jobs, and prototypes but do not scale for serious projects”

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–Armchair Academic “You cannot possibly ship software without a formal veriﬁcation of correctness”

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POPPYCOCK! • 4+ million LOC • Python (2.7 for the most part, sigh) • 2,351 contributors to the Liberty release • 28,647 accepted contributions • HP, Redhat, Mirantis contributed over 13k commits to Liberty as the top 3 out of 165 companies Source: http://stackalytics.com http://activity.openstack.org/dash/browser/?release=liberty

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POPPYCOCK! • RackSpace • HP • DreamCompute • Internap • … and many more

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DREAMCOMPUTE • 2721.31 VMs running on average • 1.38 VCPU per VM on average • 1.65 GB of RAM per VM on average • 3755 VCPUs active • 4501 GB of RAM active

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IT WORKS PRETTY WELL

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IT WORKS PRETTY WELL … and it’s all powered by a wimpy toy-language with no static types or SAT-solving compilers…

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BLUEPRINTS https://blueprints.launchpad.net/nova

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DEVSTACK http://docs.openstack.org/developer/devstack/

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CODE REVIEW https://review.openstack.org

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CODE REVIEW https://review.openstack.org

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CONTINUOUS INTEGRATION

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THANK YOU