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Scalability and Efficiency with Fly.io and Firecracker
This chapter explores the scalability of a proxy system like Fly.io utilizing the fly-replay header for load balancing, offloading requests, and routing based on customer locations. It discusses the use of Firecracker for encapsulating applications and dependencies safely, comparing it to traditional VMs, and highlighting its advantages in reducing attack surfaces and boot times while addressing limitations like lack of GPU support. Additionally, insights on Docker images, hosting infrastructure, and core allocation in micro VMs are shared, along with design choices for website optimization.