Hello,

I hope this message finds you well.

I am currently using OpenStack version 2024.1, with Ceph Octopus as the backend storage. The configuration is as follows:

Glance is configured to use the "images" pool on Ceph.

The virtual machine disks are stored on the "vms" pool.

When I attempt to create a snapshot of a running instance, the instance appears to freeze for a few seconds, during which it loses network connectivity (e.g., I cannot ping it). This behavior is unexpected, as I understand that snapshot operations, especially with Ceph backend, should not significantly interrupt the instance's runtime.

Could you please advise what might be causing this issue? Are there any known limitations, configurations, or best practices I should be aware of regarding snapshot behavior with Ceph in this version of OpenStack?

Looking forward to your insights.

Best regards,