What is an Overcloud?
Overcloud is a cloud computing term that refers to a cloud infrastructure that is built on top of another cloud or infrastructure. In other words, it is a cloud that is layered on top of another cloud, creating a more complex and robust cloud environment.
The term "overcloud" was coined by analogy with the concept of an "undercloud," which refers to the underlying infrastructure or foundation upon which a cloud is built. Just as an undercloud provides the basic building blocks for a cloud, an overcloud adds additional layers of functionality and resources on top of that foundation.
Overclouds can be used for a variety of purposes, such as:
1. Extending the capabilities of a cloud: An overcloud can be used to add new features or services to an existing cloud infrastructure, such as adding a layer of security or networking functionality.
2. Creating a multi-tenant cloud: An overcloud can be used to create a shared cloud environment that is accessible by multiple users or organizations, each of whom has their own dedicated resources and applications.
3. Providing disaster recovery: An overcloud can be used as a backup or disaster recovery solution, providing a redundant infrastructure that can be activated in the event of an outage or other disaster.
4. Enabling hybrid cloud: An overcloud can be used to connect different cloud environments, such as public and private clouds, creating a hybrid cloud that allows for greater flexibility and scalability.
Overall, the concept of overclouds is an important one in cloud computing, as it allows for the creation of more complex and robust cloud environments that can meet the needs of a wide range of users and organizations.
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