41st Meetup | Where did my disk go? A snapshot sprawl story
Details
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Your VM monitoring says the disk is 20% full. The host system says it’s 100% full.
Join us this Friday for a focused session exploring the reality of virtualization, the "ghosts" in your infrastructure metrics, and how you can level up your systems engineering toolkit.
This talk breaks down where that missing disk space actually goes. We’ll trace a write operation directly from a guest application, through virtualization, down to the QEMU block layer and the qcow2 format on the host filesystem.
The core of the talk focuses on snapshot sprawl: a real-world scenario where snapshots silently consume host storage behind the scenes. You’ll learn how to identify the root cause, run the right diagnostics, and apply the exact fixes needed to prevent host storage exhaustion.
What we'll cover:
- The write path: Guest OS -> Hypervisor -> QEMU block layer -> Host filesystem.
- How qcow2 mechanics cause guest vs. host metric mismatches.
- Practical methods to detect, fix, and prevent snapshot sprawl.
Bring your builder mindset. See you there!
RSVP & Event Details: Register and view the same event on Luma here: https://luma.com/f2rd2tl1