Information Technology Reference
In-Depth Information
h
e Bottom Line
Coni gure and execute vMotion.
vMotion is a feature that allows running VMs to be
migrated from one physical ESXi host to another physical ESXi host with no downtime to end
users. To execute vMotion, you must make sure both the ESXi hosts and the VMs meet spe-
cii c coni guration requirements. In addition, vCenter Server performs validation checks to
ensure that vMotion compatibility rules are observed.
Master It
A certain vendor has just released a series of patches for some of the guest
OSes in your virtualized infrastructure. You request an outage window from your super-
visor, but your supervisor says to just use vMotion to prevent downtime. Is your supervi-
sor correct? Why or why not?
Master It
Is vMotion a solution to prevent unplanned downtime?
Ensure vMotion compatibility across processor families.
vMotion requires compatible
CPU families on the source and destination ESXi hosts in order to be successful. To help alle-
viate any potential problems resulting from changes in processor families over time, vSphere
offers Enhanced vMotion Compatibility (EVC), which can mask differences between CPU
families to maintain vMotion compatibility.
Master It
Can you change the EVC level for a cluster while there are VMs running on
hosts in the cluster?
Use Storage vMotion.
Just as vMotion is used to migrate running VMs from one ESXi host
to another, Storage vMotion is used to migrate the virtual disks of a running VM from one
datastore to another. You can also use Storage vMotion to convert between thick and thin
virtual disk types.
Master It
Name two features of Storage vMotion that would help administrators cope
with storage-related changes in their vSphere environment.
Perform combined vMotion and Storage vMotion.
Using vMotion and Storage at the same
time gives you greater l exibility when migrating VMs between hosts. Utilizing this feature
can also save time when you must evacuate a host for maintenance.
Master It
A fellow administrator is trying to migrate a VM to a different datastore and
a different host while it is running and wishes to complete the task as quickly and as sim-
ply as possible. Which migration option should she choose?
Coni gure and manage vSphere Distributed Resource Scheduler.
vSphere Distributed
Resource Scheduler enables vCenter Server to automate the process of conducting vMotion
migrations to help balance the load across ESXi hosts within a cluster. You can automate DRS
as you wish, and vCenter Server has l exible controls for affecting the behavior of DRS and
specii c VMs within a DRS-enabled cluster.
Master It
You want to take advantage of vSphere DRS to provide some load balancing
of virtual workloads within your environment. However, because of business constraints,
you have a few workloads that should not be automatically moved to other hosts using
vMotion. Can you use DRS? If so, how can you prevent these specii c workloads from be-
ing affected by DRS?
