Bug 1944723

Summary: [RFE] Support virtual machines with 16TB memory
Product: Red Hat Enterprise Virtualization Manager Reporter: Steffen Froemer <sfroemer>
Component: ovirt-engineAssignee: Arik <ahadas>
Status: CLOSED ERRATA QA Contact: Qin Yuan <qiyuan>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 4.4.4CC: ahadas, dfodor, emarcus, mavital, michal.skrivanek, mtessun, yama
Target Milestone: ovirt-4.4.6Keywords: FutureFeature
Target Release: 4.4.6   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: ovirt-engine-4.4.6.4 Doc Type: Enhancement
Doc Text:
With this release, running virtual machines is supported for up to 16TB of RAM on x86_64 architectures.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2021-06-01 13:23:01 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Virt RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1819286    
Bug Blocks: 1909645    

Description Steffen Froemer 2021-03-30 14:51:49 UTC 
Description of problem:
For SAP HANA certification of VMs with 12TB of memory, it's required to have VMs in RHV supporting this amount of memory

Version-Release number of selected component (if applicable):
RHV-4.4.z

How reproducible:


Steps to Reproduce:
1. Create a VM in RHV UI
2. Change amount of Memory to 12 TB
3.

Actual results:
Currently, it's not supported by Red Hat to run VMs with Memory > 6TB

Expected results:
A VM should be possible to create and started

Additional info:
https://access.redhat.com/articles/906543
Comment 9 Qin Yuan 2021-04-22 08:36:35 UTC 
Verified with:
ovirt-engine-4.4.6.5-447.gd80dda7.9.el8ev.noarch

Steps:
QE doesn't have HW supporting 16TB memory VM, so only check if setting maximum memory to 16TB works.

1. Create a VM on UI, set maximum memory to 16TB, run it.
2. Create a VM via API, set maximum memory to 16TB, run it:
<vm>
  <name>testvm16T_api</name>
  <memory>1073741824</memory>
  <memory_policy>
      <guaranteed>1073741824</guaranteed>
      <max>17592186044416</max>
  </memory_policy>
  <template>
    <name>latest-rhel-guest-image-8.3-infra</name>
  </template>
  <cluster>
    <name>golden_env_mixed_1</name>
  </cluster>
</vm>

Results:
1. VM with 16TB maximum memory can be created and started successfully on UI.
2. VM with 16TB maximum memory can be created and started successfully via API.
Comment 13 errata-xmlrpc 2021-06-01 13:23:01 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 (Moderate: RHV Manager security update (ovirt-engine) [ovirt-4.4.6]), and where to find the updated
files, follow the link below.

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

https://access.redhat.com/errata/RHSA-2021:2179