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Bug 1694974

Summary:	[RFE] [NVMeOverFC] NVMe Native Multipath and ANA support in DMMP
Product:	Red Hat Enterprise Linux 8	Reporter:	Aviv Guetta <aguetta>
Component:	device-mapper-multipath	Assignee:	Ben Marzinski <bmarzins>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Lin Li <lilin>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.1	CC:	agk, bmarzins, emilne, heinzm, lilin, msnitzer, muli, nyewale, orit.was, prajnoha, zkabelac
Target Milestone:	rc
Target Release:	8.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-09-17 16:28:49 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Comment 1 Ben Marzinski 2019-09-06 22:15:41 UTC

rhel-8.1 device-mapper-multipath currently has an ANA prioritizer, which is automatically enabled if ANA support is detected on nvme devices. Is there any more work that needs to be done here?

Comment 3 Ben Marzinski 2019-09-09 14:49:39 UTC

Native NVMe Multipath is supported in RHEL-8.1, right Ewan?

Comment 4 Ewan D. Milne 2019-09-09 15:16:59 UTC

The NVMe Native Multipath support is present in 8.1.  It is not the default, however,
the kernel option "nvme_core.multipath=Y" must be used to enable it instead of DM-MP.
It includes the mechanism to read the ANA state and use paths accordingly.

As far as "supported", that really depends upon the storage array vendor qualification.

Different vendors may chose whether to recommend DM-MP or NVMe Native multipath.
We (Red Hat) prefer to offer both alternatives to the customer.

Comment 5 Ben Marzinski 2019-09-17 16:28:49 UTC

I'm closing this bug, on the grounds that these issues have already been addressed in RHEL-8.1. If I'm missing something, please reopen the bug with an explanation of the outstanding issues.