There are many truths in computing. So many that we don’t even think about them as “truths”, they’re just there all the time, and we just teach new IT folks to accept them. But every now and then something throws one of our truths under the bus.
VDI has tossed the truth of “Disk is Cheap, Memory is Expensive” under the bus for persistent desktops.
Obviously if you compare GB to GB, disk is less expensive than memory. But if you take a deeper look at VDI and break down the hardware cost of supplying a virtual desktop, you will see that disk is much more expensive than memory as a line item per VM.
How do I back this theory up? Well let’s take a VDI environment that is expected to perform at a pretty high level. For a standard VM in this environment you will probably assign one GB of memory, maybe two. On the outside you may assign four GB if you are really looking for performance. So let’s take those three numbers as an example and look at memory cost.
To learn more and to read the entire article at its source, please refer to the following page, Memory is Cheap, DISK IS EXPENSIVE! When you’re a Virtual Desktop…- Unidesk's Virtual Desktop Management Blog
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