Red Hat Bugzilla – Bug 633370
[6.1 FEAT] Enhance QED image format to support streaming from remote systems
Last modified: 2014-07-24 23:07:00 EDT
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@redhat.com 5. Primary contacts at Partner: Project Management Contact: Michael W. Wortman, wortman@us.ibm.com Technical contact(s): ANTHONY N. LIGUORI, aliguori@us.ibm.com
What is the component for this and is it upstream? Please provide more details about is being requested here.
------- Comment From aliguori@us.ibm.com 2010-09-21 18:19 EDT------- Component is QEMU, patches are available but not yet merged upstream.
------- Comment From rsisk@us.ibm.com 2010-10-04 11:22 EDT------- Code Upstream Status: Submitted
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 From mcintire@us.ibm.com 2011-01-17 14:07 EDT------- Now targeted to 6.2
It would need to be upstream by the development freeze date (in 2 months)
Hi Anthony, For QED is mainly developed and tested by ibm, can IBM test this bug. Thanks Suqin
IBM is signed up to test and provide feedback, setting OtherQA.
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@uk.ibm.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