|
Measures reported by HvGuestStatusTest
Hyper-V™ live migration is designed to move running VMs with no impact on VM availability to users. By pre-copying the memory of the migrating VM to the destination physical host, live migration minimizes the amount of transfer time of the VM A live migration is deterministic, meaning that the administrator, or script, that initiates the live migration can control which computer is the destination for the live migration. The guest operating system in the migrating VM is unaware that the migration is happening, so no special configuration for the guest operating system is needed.
Below is a summary of the live migration process:
- All VM memory pages are transferred from the source Hyper-V™ physical host to the destination Hyper-V™ physical host. While this is occurring, any VM modifications to its memory pages are tracked.
- ™Pages that were modified while step 1 was occurring are transferred to the destination physical computer.
- The storage handle for the VM's VHD files are moved to the destination physical computer.
- The destination VM is brought online on the destination Hyper-V™ server.
This test reports the number of guests registered with the server, and promptly alerts administrators to addition/removal of guests from the server.
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Registered_guests |
Indicates the total number of virtual machines that have been registered with the server currently. |
Number |
|
| Guests_powered_on |
Indicates the number of guests that are currently powered on. |
Number |
To know which are the guests that are powered on, use the detailed diagnosis capability of this measure (if enabled).
|
| Guests_with_users |
Indicates the number of powered on guests with users logged in currently. |
Number |
To know which guests the users have logged into, use the detailed diagnosis capability of this measure (if enabled). Note that this measure will not be available for the 'Hyper-V' server model.
|
| Guests_without_users |
Indicates the number of powered on guests without any users logged in currently. |
Number |
Note that this measure will not be available for the 'Hyper-V' server model.
|
| Added_guests |
Indicates the number of guests that were newly added to the server during this measurement period. |
Number |
The detailed diagnosis of these measures, if enabled, lists the virtual machines that were migrated to or from (as the case may be) the Hyper-V server.
|
| Removed_guests |
Indicates the number of guests that were newly removed from the server during this measurement period. |
Number |
|