For scalability purposes, IT resources have to be pooled in order to provide additional resources on a need basis. The auto-scaling capability can be realized when the appropriate resources are pooled. The challenge here is that of manually establishing and maintaining the level of required synchronicity across a collection of shared resources. Any kind of variance or disparity among shared IT resources potentially can lead to inconsistency and sometimes result in risky operations. The solution is to get identical IT resources and pool them to be leveraged when necessary. The key resources include bare metal (BM) servers, virtual machines (VMs), and containers. Furthermore, the fine-grained resources include memory, storage, processing cores, I/O, and so on. There are several monitoring, measurement, and management tools in place for resource provisioning, replication, and utilization.