6.5.1

Table Of Contents
Configure Virtual Flash Resource for Caching I/O Filters
If your caching I/O filter uses local flash devices, configure a virtual flash resource, also known as VFFS
volume. You configure the resource on your ESXi host before activating the filter.
Prerequisites
To determine whether the virtual flash resource must be enabled, check with your I/O filter vendor.
Procedure
1 In the vSphere Web Client, navigate to the host.
2 Click the Configure tab.
3 Under Virtual Flash, select Virtual Flash Resource Management and click Add Capacity.
4 From the list of available flash drives, select one or more drives to use for the virtual flash resource
and click OK.
The virtual flash resource is created. The Device Backing area lists all the drives that you use for the
virtual flash resource.
Enable I/O Filter Data Services on Virtual Disks
Enabling data services that I/O filters provide is a two-step process. You create a virtual machine policy
based on data service capabilities that the I/O filters provide, and then attach this policy to a virtual
machine.
Prerequisites
For the caching I/O filters, configure the virtual flash resource on your ESXi host.
Procedure
1 Define a VM Policy Based on I/O Filter Capabilities
To enable I/O filters for virtual machines, you must first create a virtual machine policy that lists data
service capabilities provided by the I/O filters.
2 Assign the I/O Filter Policy to Virtual Machines
To activate data services that I/O filters provide, associate the I/O filter policy with virtual disks. You
can assign the policy when you create or edit a virtual machine.
What to do next
If you later want to disable the I/O filter for a virtual machine, you can remove the filter rules from the VM
storage policy and reapply the policy. See Edit or Clone a VM Storage Policy. Or you can edit the
settings of the virtual machine and select a different storage policy that does not include the filter.
Define a VM Policy Based on I/O Filter Capabilities
To enable I/O filters for virtual machines, you must first create a virtual machine policy that lists data
service capabilities provided by the I/O filters.
vSphere Storage
VMware, Inc. 302