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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
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.
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 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.
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