In several virtualization systems you can have a virtual disk drive: -thick, so a thick disk of 100gb uses 100gb of space; -thin, so a thin disk of 100gb uses 0gb when empty and starts using space when the virtual machine fills it.
So I can have a real hdd of 250gb with inside ten virtual thin disks of 1000gb each, if they are almost empty. I have checked again and ceph rbd are "thin". BTW: I thank you for you explanation of persistent/not persistent, I was not able to find it in docs. Can you explain me also what a "volatile disk" is? A not persistent image is writeable? When you reboot a vm with a not persistent image you lose all datda written to it? Thanks again, Mario 2013/12/12 Kenneth <[email protected]> > Hi, > > Can you elaborate more on what you want to achieve? > > If you have a 100GB image and it is set to persistent, you can instantiate > that image immediately and deploy/live migrate it to any nebula node. Only > one running instance of VM of this image is allowed. > > If it is a 100GB non persistent image, you'll have to wait for ceph to > "create a copy" of it once you deploy it. But you can use this image > multiple times simutaneously. > --- > > Thanks, > Kenneth > Apollo Global Corp. > > On 12/11/2013 07:28 PM, Mario Giammarco wrote: > > Hello, > I am using ceph with opennebula. > I have created a 100gb disk image and I do not understand if it is thin or > thick. > > I hope I can have thin provision. > > Thanks, > Mario > > _______________________________________________ > Users mailing > [email protected]http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > >
_______________________________________________ Users mailing list [email protected] http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
