6.0

7 Select a specification for the rule.
n
Must run on hosts in group. Virtual machines in VM Group 1 must run on hosts in Host Group A.
n
Should run on hosts in group. Virtual machines in VM Group 1 should, but are not required, to
run on hosts in Host Group A.
n
Must not run on hosts in group. Virtual machines in VM Group 1 must never run on host in Host
Group A.
n
Should not run on hosts in group. Virtual machines in VM Group 1 should not, but might, run on
hosts in Host Group A.
8 Click OK.
Creating a Datastore Cluster
A datastore cluster is a collection of datastores with shared resources and a shared management interface.
Datastore clusters are to datastores what clusters are to hosts. When you create a datastore cluster, you can
use vSphere Storage DRS to manage storage resources.
NOTE Datastore clusters are referred to as storage pods in the vSphere API.
When you add a datastore to a datastore cluster, the datastore's resources become part of the datastore
cluster's resources. As with clusters of hosts, you use datastore clusters to aggregate storage resources,
which enables you to support resource allocation policies at the datastore cluster level. The following
resource management capabilities are also available per datastore cluster.
Space utilization load
balancing
You can set a threshold for space use. When space use on a datastore exceeds
the threshold, Storage DRS generates recommendations or performs Storage
vMotion migrations to balance space use across the datastore cluster.
I/O latency load
balancing
You can set an I/O latency threshold for bottleneck avoidance. When I/O
latency on a datastore exceeds the threshold, Storage DRS generates
recommendations or performs Storage vMotion migrations to help alleviate
high I/O load.
Anti-affinity rules
You can create anti-affinity rules for virtual machine disks. For example, the
virtual disks of a certain virtual machine must be kept on different
datastores. By default, all virtual disks for a virtual machine are placed on
the same datastore.
Create a Datastore Cluster
You can manage datastore cluster resources using Storage DRS.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
1 In the Datastores and Datastore Clusters view of the vSphere Client inventory, right-click the
Datacenter object and select New Datastore Cluster.
2 Follow the prompts to complete the Create Datastore Cluster wizard.
vSphere Administration with the vSphere Client
368 VMware, Inc.