Your VM monitoring says the disk is 20% full, but the host system says it is 100% full. Join us for the 41st DevOps Kathmandu meetup featuring Pravesh Gaire, Support Engineer at Canonical, for a focused session exploring the reality of virtualization.
The talk reveals the ghosts in your infrastructure metrics and shows how to level up your systems engineering toolkit. It breaks down where missing disk space goes by tracing a write operation from a guest app through virtualization to the QEMU block layer and the qcow2 format on host filesystem.
The session highlights snapshot sprawl in a real‑world scenario where snapshots silently consume host storage behind the scenes, offering practical methods to identify root causes, run diagnostic tools and apply exact fixes to prevent host storage exhaustion.
Event Details
📅 Date: Friday, Oct 9, 2026 (Ashoj 23, 2083)
⏰ Time: 5:00 PM NPT
📍 Venue: EKbana Solutions Pte. Ltd., Kathmandu
🔗 Registration Link: Registration
What You'll Learn ?
• The write path: Guest OS → Hypervisor → QEMU block layer → Host filesystem
• qcow2 mechanics: cause guest vs host metric mismatches
• Snapshot sprawl: Practical methods to detect, fix and prevent
Pravesh Gaire
Support Engineer
Canonical
