6.7

If no preconfigured groups are available, Virtual Volumes can use an automatic method. With the
automatic method, Virtual Volumes creates a replication group on demand and associates this group with
a Virtual Volumes object being provisioned. If you use the automatic replication group, all components of
a virtual machine are assigned to the group. You cannot mix preconfigured and automatic replication
groups for components of the same virtual machine.
Virtual Volumes and Fault Domains
In the Virtual Volumes environment, fault domains define how specific replication groups must be
combined when being replicated from a source to a target site.
Fault domains are configured and reported by the storage array, and are not exposed in the
vSphere Client. The Storage Policy Based Management (SPBM) mechanism discovers fault domains and
uses them for validation purposes during a virtual machine creation.
For example, provision a VM with two disks, one associated with replication group Anaheim: B, the
second associated with replication group Anaheim: C. SPBM validates the provisioning because both
disks are replicated to the same target fault domains.
Repl. Group:”Anaheim:A”
Repl. Group:”Anaheim:B”
Repl. Group:”Anaheim:C”
Repl. Group:”Anaheim:D”
Repl. Group:”Anaheim:E”
Repl. Group:”Boulder:A”
Repl. Group:”Boulder:B”
Repl. Group:”Boulder:C”
Repl. Group:”New-York:A”
Repl. Group:”New-York:B”
Repl. Group:”New-York:C”
Repl. Group:”New-York:D”
Fault Domain: “Anaheim”
Source
Fault Domain: “Boulder”
Fault Domain: “New-York”
Valid Configuration
Target
vSphere Storage
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