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From Dmytro Shevchenko <>
Subject VM not responding on commands until snapshot running
Date Thu, 29 Sep 2016 14:47:12 GMT

I noticed that while volume snapshot running, VM not executing other 
commands as Reboot or Stop. They are waiting in queue until previous 
command completed. Can anyone explain this behaviour, is this normal and 

I'm using Ceph as primary storage and creating snapshot takes several 
seconds, but as next step CS copy this snap to secondary storage via 
'qemu-img convert ...' and this operation is quite slow.

Tested on 4.5.1 and versions. Ceph as primary storage and NFS as 

Best regards

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