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James Cann

Scaling acloudbased

Game Infrastructure

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Build a game!

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Will it fly?

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Build a database!

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Will it float?

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Get some servers!

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DIY Server Farm

hardware

softwareoperating system

raid memoryredundancy

scalability

read-write performance

database

load-balancerbackups

Dantes Inferno!

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Will it scale?

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Will it fly?Will it float?Will it scale?These questions seem identical to most people

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Scalinggames != website

traffic"

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Scaling yourgame means launching

today and possiblysupporting 100,000 users."

tomorrow..."

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The CloudCloud computing is Internet-based computing,whereby shared servers provide resources, software,and data to computers and other devices on demand,as with the electricity grid. ""Cloud computing is a natural evolution of thewidespread adoption of virtualization, service-orientedarchitecture and utility computing. Details areabstracted from consumers, who no longer have needfor expertise in, or control over, the technologyinfrastructure "in the cloud" that supports them.[1]""Danielson, Krissi (2008-03-26). "Distinguishing Cloud Computing from Utility Computing"""

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The CloudWhat cloud computing vs. dedicatedserver rental meant to us:"""Commoditized-hardware"Big-iron performance at dedicated server prices"Hardware expertise"Server technology expertise"Reliability and up-time"Rapid resource allocation"Conserve in-house attention"

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Beyond web 2.0"Games are web 3.0 (maybe web 4.0)Critical masses of users accessing read-write

resources with always-on devicesGaming traffic patterns and data consumption

is burst-able, chatty, and highly unpredictable in

early stagesRegardless of theoretical measurements thatcan be made, a small team of 3 people have

more important things to do

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Its not a yes or no question"it's an economics question:"

Will it scale? Yes, no, maybe

Hardware / SoftwareWetware*System Expectations

*you and me and the database guru"

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The CloudContextualizing scalability in the cloud when we framethis as an ROI analysis:"""Commoditized-hardware"Big-iron performance at dedicated server prices"Hardware expertise"Server technology expertise"Reliability and up-time"Rapid resource allocation"Conserve in-house attention"We get high-performance, high-availability, high-concurrency, dedicated expertise to accommodate moretraffic for less money."""

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Hardware / Software"

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Hardware / Software"

daily active users = vertical"concurrent users = horizontal

"

The good news is there are early beacons:"1)Daily active users"2)Concurrent users"

vertical = bigger (more cpu, memory)"horizontal = more (more db, app nodes)"

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Analysis"Hardware:"Disk I/O"CPU graphs"Bandwidth""Software:"NewRelic

"dTrace"

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Ultimately, the databasewill become the problem"

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Scaling the database

Reads-writes (reads are easy!)

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Scaling the database

Reads-writes (writes are @#$% hard!) Sharding Master-master NoSQL (Cassandra, Riak)

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Scaling the database

Sharding

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Scaling the database

Master-master

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Scaling the database

NoSQL (Riak)

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2011 Technology Trends:"NoSQL"Stack optimizations: Rails = Rack, Metal

"Server-side Javascript (Node.js)"Cloud services (load balancers, security, db)"

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Thank YouWebinar recording and slides will be available at

joyent.com/resources/webinars on 1/12www.joyent.com

Special thanks to Sean Johnson for server graphics