Replit rebuilds its microVM sandbox engine
What happened
On November 7, the Hacker News front page reported that Replit has finished rebuilding its sandbox engine on microVMs and migrated hundreds of millions of projects with no data loss and no downtime. The new engine uses Cloud Hypervisor and KVM, giving each sandbox its own Linux kernel, with network access policy and credential proxying enforced on the host side. With a warm pool and on-demand remote block storage, a sandbox with the customer disk already mounted takes about 500 milliseconds to obtain. The new engine also supports deployment to a customer's AWS, Google Cloud or Azure environment.
Written by AI from the coverage · updated 6 hours ago
Coverage
Follow the reports to see the story from different sides.
- Hacker News front pageReplit rebuilt its sandbox engine with microVMs
Replit 已完成基于 microVMs 的沙箱引擎重构，并在无数据丢失、无中断的情况下迁移了数亿个项目。新引擎采用 Cloud Hypervisor 和 KVM，为各沙箱提供独立 Linux 内核，并在宿主侧执行网络访问策略和凭据代理。通过预热池与按需加载的远程块存储，获取已挂载客户磁盘的沙箱耗时约 500 ms，同时支持部署到客户的 AWS、Google Cloud 或 Azure 环境。
Heat over time
Heat now 8·Comparable peak 10（Nov 7 05:00）·Comparable change over 24 hours –
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