Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

Bug 1706778

Summary:	[Docs] Document the support of Infiniband
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	Dominik Holler <dholler>
Component:	Documentation	Assignee:	rhev-docs <rhev-docs>
Status:	CLOSED DUPLICATE	QA Contact:	Michael Burman <mburman>
Severity:	unspecified	Docs Contact:	Eli Marcus <emarcus>
Priority:	medium
Version:	unspecified	CC:	ailan, ddutile, lsurette, ltsai, mperina, mtessun, raldaz, rdlugyhe, srevivo, tburke
Target Milestone:	ovirt-4.3.4	Keywords:	Documentation, Reopened
Target Release:	---	Flags:	rdlugyhe: needinfo- lsvaty: testing_plan_complete-
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:	2022-04-05 13:46:03 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Network	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1506198
Bug Blocks:

Description Dominik Holler 2019-05-06 09:57:01 UTC

Infiniband is a family of networking technologies.
Parts of them are known to work in RHV as an alternative to Ethernet in host networking.

The documentation is currently missing information about how Infiniband can be used in RHV and its support state.

Comment 5 Don Dutile (Red Hat) 2019-05-07 20:34:43 UTC

Rolfe,
bz 569625 is referring to an 'infiniband bridge', akin to an ethernet-bridge -- the latter often just referred to as just 'a bridge', implying a network bridge, implying an ethernet network bridge.   The logical idea of an infiniband bridge would be to allow a virtual ib-device to 'bridge' to a real ib-device.
That does not exist anywhere.

What is mentioned as 'Infiniband support' under RHEV is the use of Infiniband on the host to provide iscsi-based/protocol devices over Infiniband -- a technology referred to as 'iSER' under Infiniband.  CONNECTED-MODE means its operating more like a TCP/IP connection, and not like a Datagram-mode/UDP connection over Infiniband.

It's not much different then 'iSCSI over Ethernet' ... again, that's what everyone assumes/expects for iSCSI(Ethernet), but in this case, it's iSCSI packets sent over Infiniband.

The Mellanox pdf loading (M)OFED on the RHEV server -- once that is done, it would violate the support SLA, as it would modify the kernel. :-/
But from the context on the Mellanox pdf, you'll see it mentions iSER. 

Basically, it'll use the host to provide iSCSI devices to be distributed/used/shared by VMs.

Sufficient?

Comment 23 Raul Aldaz 2022-04-05 13:46:03 UTC


*** This bug has been marked as a duplicate of bug 1506198 ***