Bug 463862 - [LTC 6.0 FEAT] 201257:KVM high performance multinode support
[LTC 6.0 FEAT] 201257:KVM high performance multinode support
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm (Show other bugs)
All All
high Severity high
: alpha
: 6.0
Assigned To: Eduardo Habkost
Virtualization Bugs
: FutureFeature, OtherQA
Depends On:
Blocks: 356741 511888 512364 524565 554559 555199 555224
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Reported: 2008-09-24 19:20 EDT by IBM Bug Proxy
Modified: 2010-11-10 16:24 EST (History)
7 users (show)

See Also:
Fixed In Version: qemu-kvm-
Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2010-11-10 16:24:03 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description IBM Bug Proxy 2008-09-24 19:20:25 EDT
=Comment: #0=================================================
Emily J. Ratliff <emilyr@us.ibm.com> - 2008-09-24 13:53 EDT
1. Feature Overview:
Feature Id:	[201257]
a. Name of Feature:	Xen high performance multinode support
b. Feature Description
Further improvements to the Xen hypervisor to become consistent with the base level kernel, i.e.
#cpu (256), amount of mem (6TB),  scaling/perf/numa enhancements, automatic cpu pinning.   
Customers are looking for improvements to limitation that are currently existent in XEN.

Additional Comments:	256 CPU Support (128 physical / 256 with HT) / 6TB Memory Support

2. Feature Details:
Sponsor:	xSeries

Arch Specificity: Both
Affects Core Kernel: Yes
Delivery Mechanism: Direct from community
Category:	Kernel
Request Type:	Kernel - Enhancement from Upstream
d. Upstream Acceptance:	In Progress
Sponsor Priority	1
f. Severity: High
IBM Confidential:	no
Code Contribution:	3rd party code
g. Component Version Target:	Xen Enhancements

3. Business Case
Our flagship multi-node product, x3950 M2, will support up to 96 cpus by the end of 2008.  We are
expecting this number to at least reach 256 logical threads in 2009/2010.  Wtih 16GB DIMMS coming
out, expect the max memory to be as high as 6TB.

4. Primary contact at Red Hat: 
John Jarvis

5. Primary contacts at Partner:
Project Management Contact:
Monte Knutson, mknutson@us.ibm.com, 877-894-1495

Technical contact(s):
Kevin Stansell, kstansel@us.ibm.com
Chris McDermott, mcdermoc@us.ibm.com

IBM Manager:
Julio Alvarez, julioa@us.ibm.com
Comment 1 IBM Bug Proxy 2008-10-23 20:20:52 EDT
This should be a general requirement for the Virtualization environment for RHEL 6 (presumably KVM not Xen)  to support a platform/system capable of 256 cores/system threads and up to 6TB of memory, in a NUMA configuration.  If there's some split needed for those 2 components, or for any userland/ management/configuration/install pieces -- RH , please let us know.
Comment 3 Kevin Stansell 2009-11-18 16:34:31 EST
Yes, this should all be against KVM and libvirt, not Xen. :)
Comment 4 Dor Laor 2010-01-18 06:43:12 EST
Is it only physical constrains? Any virtual ones? For physical we should be fine.
Comment 8 John Jarvis 2010-08-27 11:23:30 EDT
IBM, please confirm this is fixed and if so, set the Verified field to "IBM"
Comment 9 Kevin Stansell 2010-09-10 10:19:13 EDT
We will follow the core RHEL6 limits here for KVM host support.  Closing.
Comment 10 releng-rhel@redhat.com 2010-11-10 16:24:03 EST
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.

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