No one knows how big the web is. No one knows how many sites are there. And no one knows exactly how many internet users are online on any given time. However, for your server rack shelves you need to be more accurate in your assumptions. For example, in choosing your server rack shelves, server cabinets or server enclosures, you need to consider scalability. This means you need to answer what kind of server storage or server rack shelves you will require in the future. Server rack or server rack enclosures enables for more efficient management and organization of any data center. However, it will not achieve this purpose if you are not accurate. So when choosing the right rack for your company, try to be as accurate as possible in assessing your future needs. Then use that as one of the main considerations in your decision. Second, in a server room, climate is one of the most important factors that affect energy consumption. It also has environmental effects on the room. Thus, one of the things that you need to take into consideration when choosing server rack shelves is how you will be able to cool the servers. If you are not sure of your options, there are many good server racks in the market. One example is Dell server rack. You can check out their servers to see which one is best for your server room. Similarly, if you are going to buy used server racks, you should follow the same principles. Know exactly what you need at present and the future. Then assess the climate or the condition of the room.