Thanks Somesh, I'll try just moving the VM and see if it triggers a datadisk migration.
Sorry, by 'bring up' I just meant migrate to a new host. On Wednesday, July 6, 2016, Somesh Naidu <[email protected]> wrote: > First off, for datadisks, you may not explicitly need to move them around. > If you detach it from the existing VM and attach it to another VM > (essentially the host running that VM) that does not have access to the > storage where the datadisk currently resides, then cloudstack will copy the > datadisk to a storage accessible to that host. > > > I’m confused why we can’t snapshot a datadisk, which, if I understand > > correctly, should then get copied to secondary storage, and then bring it > > up on another host. I hope I’m just missing something obvious. > > You can snapshot a datadisk and the snapshot will reside on the secondary > store, that bit is straight/correct. > > I do not understand what you mean when you say "bring it up on another > host". > The part that is not clear is what does "bring it up" mean? Also, what you > mean by "host", hypervisor or storage? Do you mean the datadisks are > bootable and you want to start them on a different host? If so, know that > you can't launch a VM directly off of a snapshot, you’d have to convert it > to a template and then launch a VM from it. The VM could be launched on any > host - if this is the use-case/scenario you had in mind then yes, you will > achieve what you need this way. > > Regards, > Somesh > > > -----Original Message----- > From: [email protected] <javascript:;> [mailto: > [email protected] <javascript:;>] On Behalf Of Douglas Land > Sent: Wednesday, July 06, 2016 3:03 PM > To: [email protected] <javascript:;> > Subject: Question about migrating local storage datadisks > > We use local storage for everything, including datadisks. We need to > migrate these to another host, which docs all seem to say isn’t supported. > I’m confused why we can’t snapshot a datadisk, which, if I understand > correctly, should then get copied to secondary storage, and then bring it > up on another host. I hope I’m just missing something obvious. >
