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vm instances' root and ephemeral disk data are stored in compute node's /var/lib/nova/instances. for storing user data i.e persistent, you must use cinder's block storage or swifts object store. 

Cheers ~hrushi


On Sep 4, 2013, at 10:19 PM, "Mahardhika" <mahardika.gilang at andalabs.com> wrote:

> Dear all, i have some question around my head.
> 
> 1. i have compute node and running KVM hypervisor in there, controller node and network node.
> question is, in where data that instance run store? is it on compute node?
> 2. if i want to store all data in separate node let say using swift (swift node), can this happen?
> 3. what is flavor used to store data? i mean when i create instance with selected flavor(ex:10GB), where that space that would be create? in swift node?
> 4. So if this can be done, in my compute node is just run KVM, and no data store that. right?
> 
> Thanks before.
> -- 
> Regards,
> Mahardhika Gilang
> 
> 
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