vsphere-esxi-vcenter-server-55-storage-guide

Chapter 21 About VMware vSphere Flash Read CacheProcedure1 In the vSphere Web Client, navigate to the host.2 Click the Manage tab and click Settings.3 Under Virtual Flash, select Virtual Flash Resource Management and click Add Capacity.4 From the list of available SSDs, select one or more SSDs to use for virtual flash and click OK.The virtual flash resource is created. The Device Backing area lists all SSDs that you use for the virtual flashresource.What to do nextYou can use the virtual flash resource for cache configuration on the host and Flash Read Cacheconfiguration on virtual disks. You can increase the capacity by adding more SSDs to the virtual flashresource.Set Up Multiple Virtual Flash ResourcesYou can set up multiple virtual flash resources using a batch configuration.Set up multiple virtual flash resources at the same time or increase virtual flash resource capacity on hostsalready configured with virtual flash resource.PrerequisitesVerify that hosts are configured with ESXi 5.5 or higher and have eligible SSDs so the hosts can appear inthe Add Virtual Flash Capacity list.Procedure1 In the vSphere Web Client, navigate to the host.2 Right-click the host, select All vCenter Actions > Add Virtual Flash Capacity.3 Select one or more SSD.The selected SSDs are formatted so that the virtual flash resource can use them. All data on the disks iserased.4 Click OK.Multiple virtual flash resources are created.Configure Host Swap Cache with Virtual Flash ResourceYou can reserve a certain amount of virtual flash resource for swapping to host cache.For more information, see “Swapping to Host Cache,” on page 169.PrerequisitesSet up a virtual flash resource.Procedure1 In the vSphere Web Client, navigate to the host.2 Click the Manage tab and click Settings.3 Under Virtual Flash, select Virtual Flash Host Swap Cache Configuration and click Edit.4 Select the Enable virtual flash host swap cache check box.VMware, Inc. 207