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[Qemu-devel] Taking live snapshots of running VMs
From: |
Ahmed M. Azab |
Subject: |
[Qemu-devel] Taking live snapshots of running VMs |
Date: |
Fri, 8 Jul 2011 18:24:05 -0400 |
Hi All,
Is there a way to take a live memory snapshot of a running VM without
freezing or stopping this VM?
I explored the Qemu code and documentation and I found two ways to
take a snapshot:
1-Using "savevm" Qemu monitor command, which freezes the VM for tens of seconds
2-Using "migrate" and select the destination as a file, which forces
the machine to stop after the snapshot is saved.
In production environments (where delaying the operations of a VM is
very critical), it is always useful to take memory snapshots to do
system analysis or forensics. I think Qemu should provide a way to
take a snapshot based on QOW technque of memory pages (same as the
QCOW disk snapshoting).
If such technique does not exist, I am willing it devlop it myself,
but I wonder if the Qemu community will be interested to add my patch
to future versions.
Ahmed
- [Qemu-devel] Taking live snapshots of running VMs,
Ahmed M. Azab <=