# Developer demonstrates live migration prototype for FreeBSD bhyve guests

_Published Friday, November 13, 2026 at 4:39 PM EST · Infrastructure · Latest · Tier 2 — Notable_

![Developer demonstrates live migration prototype for FreeBSD bhyve guests — Primary](https://cdn.gyptazy.com/img/freebsd-bhyve-live-migration.jpg)

A developer has demonstrated a working prototype that moves running amd64 bhyve virtual machines between FreeBSD 15.1 hosts over TCP, pausing them only for a final transfer. In a two-host test environment, a slowly dirtying 512 MiB guest showed roughly 138-171 ms of downtime.

The implementation copies memory while the guest runs, tracks changed pages, then pauses the guest to transfer remaining memory and device state. Rapidly changing memory can prevent that process from converging, requiring a longer stop-and-copy pause.

The work remains a WIP RFC dependent on experimental snapshot support. Testing has primarily used a one-vCPU guest, PCI passthrough cannot migrate, and the TCP transport has no authentication or encryption.

## Sources

- [gyptazy.com](https://gyptazy.com/blog/freebsd-bhyve-live-migration-support-rfc/)

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Canonical: https://techandbusiness.org/newswire/ch_opvLZkf2Xwc7o0M_PVc
Published: 2026-11-13T21:39:42.184Z
Story chronology: 2026-11-13T00:00:00.000Z
Retrieved: 2026-11-13T23:53:37.168Z
Publisher: Tech & Business (techandbusiness.org)