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From Tamas Monos <>
Subject RE: [Discuss] VM Snapshot
Date Mon, 06 Aug 2012 10:20:42 GMT
This would be a very welcomed feature in CloudStack.
As mentioned earlier customers always want huge volumes for their data and vmware struggles
to export them, it takes very long to time IF the export succeeds but many times I get 'Error
while taking snapshot' with exceptions all around.
End users also seem to struggle to understand the current way of snapshotting (select volume,
snapshot volume1,2,3) and the way of restoring (converting to template, re-deploy, attach
volumes, reconfigure firewall if advanced network etc).
So again, it would be a great feature and would make the end users life a lot more easier.


Tamas Monos                                               DDI         +44(0)2034687012
Chief Technical                                             Office    +44(0)2034687000
Veber: The Hosting Specialists               Fax         +44(0)871 522 7057

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-----Original Message-----
From: Mice Xia [] 
Sent: 06 August 2012 03:50
Subject: [Discuss] VM Snapshot

Hi, All,

I’d like to propose a new feature ‘VM snapshot’.

Currently CS support volume snapshot, which is an EC-2 like public cloud solution. 
IMO, it addresses problems like ‘what if my volume lost or broke down, or what if my primary
storage got an unrecoverable disruption’, in other words, it’s more like a backup solution,
and it does take considerable long time to backup and restore, especially for large volumes
which are unfortunately favored by customers.

What I want to propose is snapshots on VM, just like what Xenserver and VMware ESXi do.
It addresses requirement such as 'I want to save everything right now so that I can roll back
in the future, and both operations can be done within seconds’, mainly used for private

Plan for the first stage consists of support in Xenserver and ESXi, and draft requirements
are as followings:
- Create VM snapshot. VM snapshot consists of: its CPU/memory status (for Xenserver it needs
enterprise version), and volumes; service offerings. stored in PS, snapshots are removed when
VM is expunged.
- List snapshots for a specified VM
- Rollback VM to a specified VM
- Delete a specified snapshot
- Does not conflict with volume snapshot
- Create and restore should be done within seconds.

Before I started off writing some documents on wiki and merge code, I'd like to welcome any
comments and flames.

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