Bug 633370

Summary:	[6.1 FEAT] Enhance QED image format to support streaming from remote systems
Product:	Red Hat Enterprise Linux 6	Reporter:	IBM Bug Proxy <bugproxy>
Component:	qemu-kvm	Assignee:	Anthony Liguori <aliguori>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.1	CC:	amit.shah, bsarathy, jjarvis, juzhang, knoel, michen, mjenner, mkenneth, nobody+PNT0273897, sbest, shuang, tburke, virt-maint
Target Milestone:	beta	Keywords:	FutureFeature, OtherQA
Target Release:	6.2
Hardware:	x86_64
OS:	All
Whiteboard:
Fixed In Version:	qemu-kvm-0.12.1.2-2.190.el6	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-12-06 15:43:26 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	633380
Bug Blocks:	580953, 633374, 638197, 659725, 693510, 743047

Description IBM Bug Proxy 2010-09-13 16:43:15 UTC

1. Feature Overview:
Feature Id: [67245]
a. Name of Feature: [6.1 FEAT] Enhance QED image format to support streaming from remote systems
b. Feature Description
Enhance QED to support streaming read/write requests from remote locations to support post-migration
block migration

2. Feature Details:
Sponsor: LTC Open Virtualization
Architectures:  x86_64, 

Arch Specificity: purely common code
Affects Kernel Modules: Field does not exist
Delivery Mechanism: Direct from Community
Category: other
Request Type: Package - Update Version
d. Upstream Acceptance: Field does not exist
Sponsor Priority P3
f. Severity: normal
IBM Confidential: No
Code Contribution: IBM code
g. Component Version Target:---

3. Business Case
QED streaming allows a host to migrate a VM from a server and reclaim memory resources immediately
without waiting for the block device to finish copying.  This allows IBM to increase VM density and
have greater flexibility in managing migration strategy.

4. Primary contact at Red Hat:
John Jarvis jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Michael W. Wortman, wortman.com

Technical contact(s):
ANTHONY N. LIGUORI, aliguori.com

Comment 2 John Jarvis 2010-09-21 21:22:28 UTC

What is the component for this and is it upstream?  Please provide more details
about is being requested here.

Comment 3 IBM Bug Proxy 2010-09-21 22:20:40 UTC

------- Comment From aliguori.com 2010-09-21 18:19 EDT-------
Component is QEMU, patches are available but not yet merged upstream.

Comment 4 IBM Bug Proxy 2010-10-04 16:21:18 UTC

------- Comment From rsisk.com 2010-10-04 11:22 EDT-------
Code Upstream Status: Submitted

Comment 7 Dor Laor 2010-11-17 15:16:55 UTC

We need to be fully convinced that the QED perf/functionality cannot be provided with qcow2. That's why for the moment it's in conditional_nak state by design.

Comment 8 IBM Bug Proxy 2011-01-17 19:11:08 UTC

------- Comment From mcintire.com 2011-01-17 14:07 EDT-------
Now targeted to 6.2

Comment 9 Dor Laor 2011-06-15 12:43:39 UTC

It would need to be upstream by the development freeze date (in 2 months)

Comment 11 Suqin Huang 2011-08-15 03:51:41 UTC

Hi Anthony,

For QED is mainly developed and tested by ibm, can IBM test this bug.


Thanks 
Suqin

Comment 13 John Jarvis 2011-08-15 14:08:22 UTC

IBM is signed up to test and provide feedback, setting OtherQA.

Comment 14 John Jarvis 2011-08-15 19:34:13 UTC

This enhancement request was evaluated by the full Red Hat Enterprise Linux
team for inclusion in a Red Hat Enterprise Linux minor release.   As a result
of this evaluation, Red Hat has tentatively approved inclusion of this feature
in the next Red Hat Enterprise Linux Update minor release.   While it is a goal
to include this enhancement in the next minor release of Red Hat Enterprise
Linux, the enhancement is not yet committed for inclusion in the next minor
release pending the next phase of actual code integration and successful Red
Hat and partner testing.

Comment 18 IBM Bug Proxy 2011-10-04 12:40:35 UTC

------- Comment From stefan.hajnoczi.com 2011-10-04 08:37 EDT-------
Verified for RHEL 6.2 with test-stream.py script which exercises the stream, stop, and rate-limiting features.

Comment 21 errata-xmlrpc 2011-12-06 15:43:26 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1531.html