Bug 1041407

Summary:	[RFE][nova]: Select caching method while attaching a device
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/nova/+spec/select-caching-method-while-attaching-a-device
Whiteboard:	upstream_milestone_none upstream_status_unknown upstream_definition_new
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-03-19 17:01:04 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 16:01:08 UTC

Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/select-caching-method-while-attaching-a-device.

Description:

 At some point and depending on your application using the block device, you would like to be able to either specify none, writethrough, writeback caching options. This is currently possible in OpenStack, however this will affect all the attached volumes, there is no way to specify the option for a specific volume. Eventually, the user will be able to decide which caching method is the most suitable for his device.

This needs a new API function and new option in the CLI:

nova attach-volume --caching-method writeback <server> <volume> <device>

Specification URL (additional information):

None