81 Million subscribers worldwide and growing

Scale

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vs.

For long running stateful services

Fitness

Pending

Assigned

Urg

ency

N tasks to assign from M possible agents

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MasterMasterMaster

Agent

ENI 1

ENI 2

Compute focused Agent GroupASG-11: Active

Compute focused Agent GroupASG-10: Inactive

Network focused Agent GroupASG-21: Active

Network focused Agent GroupASG-20: Inactive

Fenzo autoscaling sets ASG’s “desired” count, honors “min” and “max”

AWS EC2 can rate limit API calls

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+ <

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“user”: … ,

“application”: … ,

“labels”: … ,

“Containers”: {

“C1”: { … }

},

“engine”: {

“jobspec”: { … }

}

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