Bug 1041289 - [RFE][nova]: Implement RBD snapshots instead of QEMU snapshots
Summary: [RFE][nova]: Implement RBD snapshots instead of QEMU snapshots
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: RFEs
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: RHOS Maint
QA Contact:
URL: https://blueprints.launchpad.net/nova...
Whiteboard: upstream_milestone_none upstream_stat...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-12-12 14:16 UTC by RHOS Integration
Modified: 2015-03-19 17:18 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-19 17:18:00 UTC
Target Upstream Version:

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Description RHOS Integration 2013-12-12 14:16:04 UTC 
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/implement-rbd-snapshots-instead-of-qemu-snapshots.

Description:

Since Havana, Nova supports libvirt_image_type=rbd. This means that you can directly and transparently (for the user) boot VM into Ceph.

However when you perform a snapshot, Nova uses QEMU snapshots, which means that you always get a full block based snapshot. With Ceph backing up all the instances disk, it is really inefficient since the backup file will go locally on the hypervisor and then will be streamed to Glance and finally uploaded into Ceph (assuming Ceph is also backing Glance). From a performance perspective, it will be way easier to use Ceph RBD snapshot directly and much faster.

Specification URL (additional information):

None
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