THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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When you increase the factor, the allocated percentage decreases and hence you can fit in more vms.
Say allocated = 100% = 100gb out of 100gb total space and overprovisioning
factor = 2 and at this moment you can't deploy more vms.
Say you change overprovisioning to 3 and allocated now becomes = 100/150 =
67%, so you can fit more vms.