Shared Resources (Erl, Naserpour)
How can the capacity of physical IT resources be used to its potential?
ProblemAllocating dedicated IT resources to individual consumers can be wasteful and underutilize their collective capacity.
SolutionPhysical IT resources are shared by partitioning them into lower capacity virtual IT resources that are provisioned to multiple cloud consumers.
ApplicationVirtualization technology is used to create virtual instances of physical IT resources. Each virtualized IT resource can be assigned to a cloud consumer, while the underlying physical IT resource is shared.
MechanismsAudit Monitor, Cloud Storage Device, Cloud Usage Monitor, Hypervisor, Logical Network Perimeter, Resource Replication, Virtual CPU, Virtual Infrastructure Manager, Virtual RAM, Virtual Server
Compound PatternsBurst In, Burst Out to Private Cloud, Burst Out to Public Cloud, Cloud Authentication and Access Management, Elastic Environment, Infrastructure-as-a-Service (IaaS), Multitenant Environment, Platform-as-a-Service (PaaS), Private Cloud, Public Cloud, Resilient Environment, Secure Burst Out to Private Cloud/Public Cloud, Software-as-a-Service (SaaS)
Each cloud consumer is allocated a virtual server instance of a single underlying physical server. In this case, the physical server is likely greater than if each cloud consumer were given its own physical server. However, the cost of one high-capacity physical server is lower than four medium-capacity physical servers and its processing potential will be utilized to a greater extent.
NIST Reference Architecture Mapping
This pattern relates to the highlighted parts of the NIST reference architecture, as follows: