URL:
Reporter RHNID: egand
Section: 5 - Section 9.5 - Lab: Migrating Virtual Machines
Language: en-US (English)||||||||
Workaround: No workaround needed, concept definition expansion

Description: #REF!

Description: The description for

"Configure this scheduling policy to avoid slot reservation on the SPM host"

could use a basic example to better explain the concept.

SpmVmGrace is described in Section 9.3 of the course:

"The SpmVmGrace property defines how many 'less' virtual machines run on the
SPM host. The default value is 5."

This implies the SPM host will always have 5 less VMs running compared to other non-SPM hosts to ensure it is able to support SPM needs.

Additionally, reading the RHV documentation states:

SpmVmGrace: Defines the number of slots for virtual machines to be
reserved on SPM hosts. The SPM host will have a lower (VM) load than other
hosts, so this variable defines how many fewer virtual machines than other
hosts it can run.

As Example 1:  Default SpmVmGrace=5  and  "10" set for
HighVmCount, then the SPM would only be able to run no more than 5 VM's compared to all other non-SPM hosts.

As Example 2:  Assign SpmVmGrace=2  and  "10" set for
HighVmCount, then the SPM would only be able to run 8 VM's (which is 2
fewer than any other host).