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[Michaël Van de Borne <michael.vandeborne@xxxxxxxx>]

is it too complicated or too simple to be answered on the ML?


Le 23/02/12 16:46, Michaël Van de Borne a écrit :
> Hi all,
>
> I'd like to understand how things go with ephemeral and persistant 
> volumes.
> For instance, say that my gold images are stored in a Swift storage 
> network, connected to Glance.
>
> When I ask Nova to boot the VM,
> - will the disk image stay in Swift storage?
> - will the physical compute node copy the image from Swift to its 
> local filesystem?
> - will ephemeral volumes be stored on local compute node filesystem 
> whereas persistant drives be stored in Swift?
>
> According to these answers, I'll know if the compute nodes of my cloud 
> should have disks attached or if no data will ever be stored on these 
> nodes even when VMs are running.
>
> maybe this is documented somewhere, but I didn't find clear 
> information about ephemeral and persistant volume management?
>
> thank you,
>
> Michaël