"One of the things that we do, since our business is more active when the weather is colder, leading up to Labor Day, we go through the exercise of reviewing all of our systems to make sure that we're scaled appropriately." "Preparing for higher traffic and building resiliency is a continuous exercise, part of day-to-day culture here," Trevino said. However, engineering teams had already designed GrubHub's AWS infrastructure and 300 application microservices to automatically scale to accommodate massive growth. It serves those apps from a combination of two AWS regions, US-East and US-West, as well as a legacy self-owned data center, and GrubHub engineers have written their own container orchestration tooling to manage approximately 9,000 Docker containers in the cloud. This surge in activity represented an equally large increase in demand for back-end IT services, which GrubHub uses to connect customers to more than 300,000 restaurants in the US and London via web and mobile apps. "Now there's higher suburban-originating traffic." "Before the pandemic… we would see higher order volume in, you know, urban centers, less so suburban ," said Alex Trevino, technical lead in GrubHub's SRE team.
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