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One of the first factors to decide is how many servers you need. For most OS X Server environments, the answer is going to be one. But the impact that scale has on the rest of the options we cover throughout this chapter cannot be discounted.
For an environment with 5 to 10 users, as would be common with a typical home environment, any of the hardware mentioned previously will suffice whatever your needs may be, with one exception: hard drive space. We’ll discuss drive capacities later in this chapter, but for now we can consider a few indicators that you need to consider a second server (or more):
You have 300 or more users: One Mac Pro can typically run things like portable home directories for a good 300 users simultaneously.