← Back to team overview

openstack team mailing list archive

understanding ephemeral and persistant volumes

 

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


--
Michaël Van de Borne
R&D Engineer, SOA team, CETIC
Phone: +32 (0)71 49 07 45 Mobile: +32 (0)472 69 57 16, Skype: mikemowgli
www.cetic.be, rue des Frères Wright, 29/3, B-6041 Charleroi



Follow ups