Temporal Overbooking of Lambda Functions in the Cloud

01/28/2019

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by   George Kesidis, et al.

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We consider the problem of scheduling "serverless computing" instances such as Amazon Lambda functions. Instead of a quota per tenant/customer, we assume demand for Lambda functions is modulated by token-bucket mechanisms per tenant. Based on an upper bound on the stationary number of active "Lambda servers" considering the execution-time distribution of Lambda functions, we describe an approach that the cloud could use to overbook Lambda functions for improved utilization of IT resources. An earlier bound for a single service tier is extended to the case of multiple service tiers.