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BP1018 Sizing and Best Practices for Citrix XenDesktop with Dell EqualLogic Storage 22
write cache activity on each desktop included all temporary OS writes such as paging. The OS disk
image reads were satisfied via network streaming through the provisioning servers and the vDisk image
was stored in a separate volume.
Figure 9 Total IOPS at member level
As you can see in Table 4, most of the IOPS were handled by high performance SSD drives and there
was very little I/O on the SAS drives. The SSD drives acted as the cache on the storage array and were
able to handle the write cache I/O load with an average disk latency of less than 2 ms.