In the example quoted, you will see

In the example quoted, you will see that the site is everything that the world recognize Cloud Computing system was used, the higher the population increased very much. The demand for more access to data. The Web example above to add more storage system based on the needs of the users that the above site is, for example, when 3-5 years ago. Compared to the current population. In the future there may be more storage systems several times.