Administrator Guide

The system processes for some time, and then the server appears inside Fluid Cache Clusters in the

Storage tab.

The Add Devices to Cluster dialog box is displayed. By default, all devices compatible with Fluid

Cache are selected.

6. Clear the option next to unwanted cache devices or click the Unselect All option, and then select the

cache devices to be added. (Select the Select All option to use all available cache devices again.)

CAUTION: Any existing data on a cache device is lost when the device is added to the Fluid

Cache cluster. Back up this data before proceeding.

7. Click OK.

The device now appears in the list in the Devices section.

If you have a shared data application such as a cluster file system or clustered application, you may want

to add the server to a server cluster (a “subcluster”) inside the Fluid Cache cluster. See Mapping Volumes.

To create a subcluster, refer to the Enterprise Manager Administrator’s Guide.

Removing a Server from a Fluid Cache Cluster

1. Make sure that no cached LUNs are in use by the ESXi server. Unmount VMFS datastores if present,

remove any RDMs or VMDKs, and so on.

2. If the server belongs to a server cluster (a “subcluster”) within a Fluid Cache cluster, remove the

server from the subcluster:

a. Prior to removing the server from a Fluid Cache cluster, you must shutdown the host or stop the

Fluid Cache service.

b. In Enterprise Manager’s Storage view, select the appropriate Storage Center. (Do not select Fluid

Cache Clusters or its contents.)

c. In the Storage tab, expand Servers if necessary and locate the server.

d. Right-click the server and select Remove Server from Cluster.

e. When asked to confirm the action, click OK.

In the Storage tab, the server now appears outside of the subcluster, but is still inside the Fluid

Cache cluster.

NOTE: Removing the server from the subcluster removes all mappings created for the

subcluster.

3. Power off the VSA:

a. Log in to the Windows vCenter client and in the Hosts and Clusters view, navigate to the VSA’s

ESXi host.

b. Right-click the VSA and select Power → Power Off. There is a delay while the system writes

cached data to disk. For a large quantity of data, this could take a considerable amount of time.

Periodically refresh the display until the VSA’s status shows that powering off is complete.

c. If you want to delete the VSA entirely, right-click the VSA again, select Delete from Disk, and

when prompted to confirm the action, click OK.

NOTE: There are important differences between powering off a VSA and deleting it entirely.

Power off the VSA if it may rejoin the same cluster but you want to free up RAM (the VSA is

configured to use 20 GB of RAM). Delete the VSA if you do not intend to use it in the same

cluster again and you want to free up disk space (the VSA uses approximately 10GB), or if

you intend to move the server to a different Fluid Cache cluster (changing clusters requires

reinstallation of the VSA).

4. Remove all Fluid Cache mappings from all volumes mapped to that server (see Removing Volume

Mappings). Note that you do not have to remove non-Fluid Cache mappings.

5. Remove the server from the Fluid Cache cluster: