Administrator Guide

CAUTION: All cached volumes and their data become inaccessible when the Fluid Cache cluster is
shut down, unless they're remapped to another cluster first.
If you do not remap the volumes before shutting down, call Dell Technical Support Services for help
remapping a shut down cluster.
NOTE: Volumes mapped to a Fluid Cache cluster that's been shut down can't be remapped
anywhere other than a Fluid Cache cluster.
Enable Server Load Equalizing for Storage
Center Volumes
Server load equalizing dynamically adjusts queue depth for volumes experiencing high IOPS to minimize the
performance impact on other volumes. Enable load equalizing on a Storage Center that hosts Fluid Cache
volumes to prevent cache flushing operations from adversely affecting performance for other volumes.
NOTE
: Enable load equalizing only for environments using Fluid Cache clusters, or if directed by Dell
Technical Support Services.
1 Click the Storage view.
2 In the Storage pane, select the Storage Center.
3 In the Summary tab, click Edit Settings. The Edit Settings dialog box appears.
4 Click the Storage tab.
5 Select the Server Load Equalizer Enabled check box.
6 Click OK.
Maintaining Fluid Cache Environments
This chapter describes tasks that must occasionally be performed after initial Fluid Cache deployment.
WARNING: When performing any operation to a server platform that hosts Fluid Cache software, you
must perform either one of the following methods:
• Shut down a single Fluid Cache Cluster node at a time and perform the host-based server updates.
After the updates to host server are complete, reboot the host and bring the Fluid Cache Cluster
node online. Before shutting down and updating the next Fluid Cache cluster node, verify that the
Fluid Cache Cluster node is added to Fluid Cache Cluster appropriately.
• Place the entire Fluid Cache Cluster into maintenance mode, and then shut down the entire Fluid
Cache Cluster by shutting down the Fluid Cache Cluster nodes one after the other.
After the updates to the host servers are complete, reboot the server and bring the Fluid Cache
Cluster nodes online.
WARNING: To avoid potential performance issues and data loss, you must NOT shutdown multiple
Fluid Cache Cluster nodes at the same time to perform Fluid Cache host server based updates.
Fluid Cache for SAN Cluster Creation and Management Operations 33