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Replit has completed a rewrite of its sandbox engine, changing the isolation boundary from Docker containers on a shared kernel to microVMs based on KVM and Cloud Hypervisor, with each sandbox having its own independent Linux kernel. According to a popular report on Hacker News, Replit smoothly migrated hundreds of millions of projects with no data loss. The new engine supports on-demand mounting of customer disks, memory snapshots, and cross-cloud deployment, and can orchestrate tens of thousands of microVMs simultaneously. There are currently no subsequent developments.
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Replit's New Sandbox Engine (Part 1): From Docker Containers to microVMsDevelopments
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Replit completes rewrite of sandbox engine and migrates hundreds of millions of projects
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Nov 5
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Replit's New Sandbox Engine (Part 1): From Docker Containers to microVMs
Replit has completed a rewrite of its sandbox engine, changing the isolation boundary from shared-kernel Docker containers to microVMs based on KVM and Cloud Hypervisor. Each sandbox now has its own independent Linux kernel, and hundreds of millions of projects were migrated smoothly with no data loss. The new engine supports on-demand mounting of customer disks, memory snapshots, and cross-cloud deployment, and can orchestrate tens of thousands of microVMs simultaneously.