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VMware Horizon 6 Desktop Virtualization Solutions by Andre Leibovici, Jason Langone, Chuck Mills, Ryan Cartwright

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Read/write I/O ratio

The read/write I/O ratio will determine how many disks are required to support the VDI workload in a RAID configuration. Now, we will learn how critical it is to understand the read and write I/O ratio to allow administrators to properly size storage arrays from a frontend (storage processors) and backend (disks) standpoint.

In the previous topic, we talked about the total number of IOPS that a virtual desktop produces during boot, login, and steady state utilization. IOPS may be read or written. Every time a disk block is read, we have a read I/O and every time a block is written, we have a write I/O.

The Windows operating systems are, by nature, very I/O-intensive, and most of those I/Os are write I/Os. This is actually a ...

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