Tag:celesto

All the articles with the tag "celesto".

• Firecracker, QEMU, and libkrun Performance Benchmarks and Sizing Profiles

  Updated:11 Oct, 2026

  17 min read

  Measured Firecracker and QEMU performance, an honest libkrun data gap, reproducible benchmark commands, and practical sizing profiles for AI sandboxes.

• How qcow2 Overlays Work in QEMU

  Updated:11 Oct, 2026

  6 min read

  Learn how qcow2 backing files work in QEMU, why they are different from Linux overlayfs, and how they make VM sandbox cloning fast and cheap.