Technical data

Solution Technology Overview
VMware Horizon View 5.3 and VMware vSphere for up to 2,000 Virtual
Desktops Enabled by Brocade Network Fabrics, EMC VNX, and EMC Next-
Generation Backup
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Figure 10. Examining storage pool space utilization
When storage pool capacity becomes exhausted, any requests for
additional space allocation on thin-provisioned LUNs fail. Applications
attempting to write data to these LUNs usually fail as well, and an outage is
the likely result. To avoid this situation, you should:
1. Monitor pool utilization.
2. Set an alert that notifies you when thresholds are reached.
3. Set the Percentage Full Threshold to allow enough buffer space to
correct the situation before an outage situation occurs.
4. Edit this setting by clicking Advanced in the Storage Pool Properties
dialog box, as seen in Figure 11.
Note: This alert is only active if there are thin LUNs in the pool because thin
LUNs provide the only way you can oversubscribe a pool. If the pool only
contains thick LUNs, the alert is not active because there is no risk of
running out of space due to oversubscription. You can also specify the
value for Percent Full Threshold, which equals Total Allocation/Total
Capacity, when a pool is created.