There are many products that are needed to manage enterprise IT infrastructure and due consideration is needed before picking the right set of products.
Simplifying IT administration is a goal for CIOs to reduce manual intervention while running day-to-day operations with the primary goal of reducing the percentage of their IT budgets spent on maintenance. The IT management costs of web companies like Google and Facebook (which cater to tens of millions of users) are extremely low when compared to the size of their infrastructures. A huge advantage they and other super-efficient companies share is gained by 1) a mostly virtualized compute workloads 2) very little legacy infrastructure and 3) most applications written to follow common patterns optimized to take full advantage of virtualized resources. Having learned from managing compute infrastructures, these companies have extended this best practice to managing storage and network resources, too.