Bug 1258739 - PowerSaving balancing not take in account CPU under utilized hosts
Summary: PowerSaving balancing not take in account CPU under utilized hosts
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: ovirt-engine
Version: 3.6.0
Hardware: All
OS: Linux
unspecified
high
Target Milestone: ovirt-3.6.0-rc
: 3.6.0
Assignee: Martin Sivák
QA Contact: Artyom
URL:
Whiteboard:
Depends On:
Blocks: 736808
TreeView+ depends on / blocked
 
Reported: 2015-09-01 07:26 UTC by Artyom
Modified: 2022-05-16 06:38 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Previously, due to the timestamp implementation in the power saving balance policy, the power saving balancer did not recognize underutilized hosts in some cases and did not migrate virtual machines to other hosts. The timestamp implementation has been updated, and virtual machines on underutilized hosts gets migrated to other hosts as expected so that the underutilized host can be shut down.
Clone Of:
Environment:
Last Closed: 2016-04-20 01:31:33 UTC
oVirt Team: SLA
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHV-46028 0 None None None 2022-05-16 06:38:36 UTC
oVirt gerrit 45558 0 master MERGED core: fix getUnderUtilizedCPUHosts function to get correct hosts Never
oVirt gerrit 45788 0 ovirt-engine-3.6 MERGED core: fix getUnderUtilizedCPUHosts function to get correct hosts Never

Description Artyom 2015-09-01 07:26:48 UTC 
Description of problem:
PowerSaving balancing not take in account CPU under utilized hosts

Version-Release number of selected component (if applicable):
rhevm-3.6.0-0.12.master.el6.noarch

How reproducible:
Always

Steps to Reproduce:
1. Add two hosts without cpu load(host_1, host_2) and wait one minute
2. Run on each host vm with one Gb of memory
3. Load one host CPU to 50%(host_1)
4. Change cluster policy to power saving with parameters:
   Low Utilization: 20
   High Utilization: 80
   CpuOverCommitmentDuration: 1
5. Wait 5 minutes


Actual results:
No migration happen from host_1 to host_2

Expected results:
Vm from host_2 must be migrated by balancing to host_1

Additional info:
Comment 1 Artyom 2015-09-01 08:03:15 UTC 
Actual results:
No migration happen from host_2 to host_1
Comment 2 Artyom 2015-09-21 12:30:16 UTC 
Verified on rhevm-3.6.0-0.16.master.el6.noarch
Comment 3 Martin Sivák 2016-01-19 10:02:05 UTC 
This bug was discovered during development/QE phase and the issue was never released to public.
Comment 4 Martin Sivák 2016-01-19 10:06:40 UTC 
Ups, wrong bug, proper doctext added.
Comment 5 Julie 2016-02-10 04:25:18 UTC 
Hey Martin,
   I made some edits to the doc text. Please let me know if it still technically accurate.

Kind regards,
Julie
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