GitHub has launched Enterprise Live Migrations (ELM) in public preview, offering a new way to migrate repositories from GitHub Enterprise Server (GHES) to GitHub Enterprise Cloud with data residency. Unlike traditional migrations requiring code freezes, ELM continuously syncs data so developers can keep working throughout the process, with cutover taking minutes rather than days. It is purpose-built for large monorepos with deep git history and high activity. ELM runs as a CLI-driven service on the GHES appliance and is available in GHES versions 3.17.14+, 3.18.8+, 3.19.5+, and 3.20.2+. It complements the existing GitHub Enterprise Importer (GEI) tool and can be run concurrently with it.
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