Optimization results – Horizon desktop IOPS

Desktop optimization benefits one infrastructure component more than any other: storage. Until all flash storage arrays achieve price parity with the traditional spinning disk arrays many of us use today, reducing the per-desktop Input/Output Operations Per Second (IOPS) required will continue to be an important part of any Horizon deployment.

On a per-disk basis, a flash drive can accommodate more than 15 times the IOPS of an enterprise SAS or SCSI disk, or 30 times the IOPS of a traditional desktop SATA disk. Organizations that choose an all-flash array may find that they have more than sufficient IOPS capacity, even without doing any optimization.

The following graph shows the reduction in IOPS that occurred after performing the optimization techniques described later in this chapter. This measurement was observed while testing the desktop using a user workload simulator:

The optimized desktop generated 15 percent fewer IOPS during the user workload simulation. By itself, that may not seem like a significant reduction, but when multiplied by hundreds or thousands of desktops, the savings become more significant.

In an era where the cost of flash-based storage systems and flash-based or dependent Software Designed Storage (SDS) used in Hyper Converged Infrastructure (HCI) appliances seems to continually decrease, there is less of a concern to consider measures that focus on decreasing Windows desktop IOPS. Just know that optimizing your virtual desktop master image is about decreasing the total infrastructure resources it requires, and not just the storage itself.
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