6.5.1

Table Of Contents
Storage Capabilities and Data Services
Certain datastores, for example, Virtual Volumes and vSAN, are represented by the storage providers.
Through the storage providers, the datastores can advertise their capabilities in the VM Storage Policy
interface. The lists of datastore capabilities, data services, and other characteristics with ranges of values
populate the VM Storage Policy interface.
You use these characteristics when you define capability-based placement rules for your storage policy.
The storage providers also represent I/O filters installed on your hosts. Through the storage provider,
information about the filter services populates the VM Storage Policy interface. You include a specific data
service in a common rule of a VM storage policy. Unlike storage-specific placement rules, common rules
do not define storage placement and storage requirements for the virtual machine. Instead, they activate
the requested I/O filter data services for the virtual machine.
Tags
Generally, VMFS and NFS datastores are not represented by a storage provider. They do not display their
capabilities and data services in the VM Storage Polices interface. You can use tags to encode
information about these datastores. For example, you can tag your VMFS datastores as VMFS-Gold and
VMFS-Silver to represent different levels of service.
You can also use tags to encode information that is not advertised by the storage provider, such as
geographical location (Palo Alto), or administrative group (Accounting).
vSphere Storage
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