Philip,

Simple answer is no.

A VM Snapshot should only be used as a temporary roll back option prior to 
making a system change.  After the planned changes are made, and as soon as you 
confirm there have been no undesired adverse affects, VM snapshots should be 
removed.

Snapshots are certainly not designed to be used as long term backups.

This is general virtualisation 'best practice' and not directly related to 
CloudStack.

When a VM has an active VM Snapshot, CloudStack limits certain features such as 
storage migration so another reason for not maintaining long term VM snapshots.

Regards

Geoff Higginbottom
CTO / Cloud Architect

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On 16 May 2014, at 20:27, "Phillip Kent" 
<phillip.k...@gmail.com<mailto:phillip.k...@gmail.com>> wrote:

Dear all,

I have some questions about using VM snapshots.

In principle, VM snapshots look like a very painless way for users to
keep backups of VMs (compared with the alternative of doing separate
volume snapshots of root disks, data volumes, etc).

But when you look more into it
(http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1015180)
you see that a lot of things can go wrong with snapshots.

So I wondered if anyone has views or experiences on this, especially
where CloudStack is being used as IaaS for paying customers. I am
thinking about end users who only have access through the UI or API, not
users who have root access to the hypervisors. Are VM snapshots a good
strategy for end users to keep regular backups of their VMs??

Thx Phillip



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