[CLOUDSTACK-8256] Add support to keep snapshots on Primary Storage if supported by backend

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.3.1, 4.4.1
• Component/s: KVM, Storage Controller
• Security Level: Public (Anyone can view this level - this is the default.)
• Labels: ceph kvm primary rbd snapshot storage
• Environment: kvm, ceph, rbd
• Assignee: Unassigned
• Reporter: Andrei Mikhailovsky
• Created: 15/Feb/15 23:52
• Updated: 12/Aug/15 06:50

Description

It would be very useful to have the ability to keep volume snapshots on the primary storage where the primary storage supports snapshotting. For instance, KVM + Ceph/RBD.

Instead of copying a snapshot to a secondary storage and retrieving it when needed, the snapshot should be used from the primary storage. This will greatly speed up the process of using snapshots and will allow large scale functionality of this feature on KVM hypervisors.

At the moment, snapshotting with KVM is not practical even on small deployments. It takes too much time and clogs the network.