Bug 1041725

Summary:	[RFE][cinder]: Snapshot Replication
Product:	Red Hat OpenStack	Reporter:	RHOS Integration <rhos-integ>
Component:	RFEs	Assignee:	RHOS Maint <rhos-maint>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	markmc, yeylon
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
URL:	https://blueprints.launchpad.net/cinder/+spec/snapshot-replication
Whiteboard:	upstream_milestone_none upstream_status_unknown upstream_definition_obsolete
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-03-19 17:34:56 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description RHOS Integration 2013-12-12 18:50:24 UTC

Cloned from launchpad blueprint https://blueprints.launchpad.net/cinder/+spec/snapshot-replication.

Description:

Make snapshots a full object which can be replicated between similar storage backends. Definable states would also be documented.

Replication of snapshots can be the most efficient way to implement both volume migration and volume mirroring. Beyond that the same mechanism can be used to build additional features:

* Archiving of snapshots on additional servers to allow a volume to be "restored" by cloning it
   at a new location. Unlike mirroring there is no need to explicitly pair active/passive servers 
   in advance. Snapshot replication can achieve disaster recovery schemes at a lower cost
   than mirroring (albeit with a longer RPO).
* Replication of snapshots can also be used to distirbute master images to poential host
   machines, where a new boot volume can be cloned from the replicated snapshot with
   far less bandwidth being required at provisioning time. This can enable more rapid
   deployment of compute nodes from master images, and allow for updates of master
   images to be less costly.


Specification URL (additional information):

https://wiki.openstack.org/wiki/Snapshot_as_full_objects