GitHub user NuxRo added a comment to the discussion: VM Disk performance issue

Hello,

I have never noticed issues using linked-clones and I suspect the culprit may 
be something else, perhaps environmental, otherwise we would have had people 
complain. Linked-clones has always been the default.

To answer your question, you cannot limit the number of images per shared image 
(ie how many VMs you can spawn from a given template).
Also, you cannot define a compute offering which contains 2 disks, you'd have 
to create the 2nd disk as part of the creation procedure.

It'd be worth doing some in-depth monitoring of the hypervisor, especially I/O 
metrics and see what is going on when you feel like it's slow etc.



GitHub link: 
https://github.com/apache/cloudstack/discussions/10468#discussioncomment-12327876

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