Federated Cloud is a system that allows organizations to leverage the benefits of multiple cloud computing providers. It involves connecting private, public, and community cloud service providers to create a single, scalable cloud computing platform. This platform enables businesses to tailor their cloud computing needs to their specific requirements and preferences, while at the same time providing access to a variety of cloud providers. The key benefits of a Federated Cloud system include better scalability and flexibility, improved security, and cost savings.

architecture of Federated Cloud:
1. Cloud Exchange
Introduction to Cloud Exchange
The Cloud Exchange acts as a mediator between cloud coordinator and cloud broker. It is responsible for mapping the demands of cloud brokers to the available services of the cloud coordinator. The cloud exchange also provides a record of the present cost, demand patterns, and available cloud providers.
Function of Cloud Exchange
The primary function of the Cloud Exchange is to act as an intermediary between cloud coordinator and cloud broker. It helps match the demands of cloud brokers to the services offered by cloud coordinators. It also provides a record of current cost, demand patterns, and available cloud providers.
Updates to Cloud Exchange
The Cloud Exchange is periodically updated by the cloud coordinator. This helps keep track of the latest cost, demand patterns, and available cloud providers.
2. Cloud Coordinator
Introduction to Cloud Coordinator
The Cloud Coordinator is responsible for assigning the resources of the cloud to the remote users based on their quality of service demands and credits in the cloud bank. It also manages membership of the cloud enterprises.
Function of Cloud Coordinator
The main function of the Cloud Coordinator is to assign the resources of the cloud to the remote users based on their demands and credits in the cloud bank. It also manages the membership of the cloud enterprises.
Updates to Cloud Coordinator
The Cloud Coordinator is regularly updated to ensure that the assigned resources of the cloud to the remote users are in accordance with their quality of service demands and credits in the cloud bank.
3. Cloud Broker
Introduction to Cloud Broker
The Cloud Broker interacts with the cloud coordinator, analyzes the Service-level agreement and the resources offered by several cloud providers in cloud exchange. It then finds the most suitable deal for the client.
Function of Cloud Broker
The Cloud Broker interacts with the cloud coordinator and analyzes the Service-level agreement and the resources offered by different cloud providers in the cloud exchange. It then determines the most suitable deal for its clients.
Updates to Cloud Broker
The Cloud Broker is regularly updated to ensure that the deals it offers to its clients are the most suitable ones. It also ensures that the resources offered by the cloud providers in the cloud exchange are in line with the Service-level agreement.

Properties of Federated Cloud:
Overview of Federated Cloud
Federated cloud computing is an emerging model that enables multiple cloud providers to combine resources and services to form a single, unified cloud platform. This model allows users to access services from multiple clouds while maintaining a single, unified user experience.
Centralized vs. Decentralized Interaction
In a federated cloud, users can interact with the architecture either centrally or in a decentralized manner. When users interact centrally, they interact with a broker to mediate between them and the organization. On the other hand, when users interact in a decentralized manner, they interact directly with the clouds in the federation.
Types of Federated Cloud
Federated cloud can be practiced in a variety of niches, including both commercial and non-commercial.
Monitoring and Visibility
The visibility of a federated cloud assists the user in understanding the organization of multiple clouds in the federation. Federated cloud can be monitored in two ways. MaaS (Monitoring as a Service) provides information that assists in tracking contracted services to the user. Global monitoring helps maintain the federated cloud.
Offers and Pricing
The providers who participate in the federation publish their offers to a central entity. The user interacts with this central entity to verify the prices and propose an offer.
Objects in the Federated Cloud
The marketing objects such as infrastructure, software, and platform have to pass through federation when consumed in the federated cloud.
Benefits of Federated Cloud:
Energy Efficiency:
Federated cloud computing enables users to minimize energy consumption by efficiently deploying and consuming resources. With a federated cloud, users can access the resources they need, when they need them, and the resources are not wasted when they are not in use.
Reliability:
Federated cloud computing helps to increase reliability. When multiple cloud service providers are involved, the workloads and services are distributed across multiple clouds, reducing the chances of downtime. This also reduces the risk of a single point of failure.
Cost Savings:
Federated cloud computing helps to reduce the time and cost of providers due to its dynamic scalability. By accessing multiple cloud service providers, users can get the most cost-effective solutions and services.
Global Connectivity:
Federated cloud computing connects various cloud service providers globally. This allows users to access the most suitable service provider depending on their location and other needs.
Scalability:
Federated cloud computing provides easy scalability of resources. This is important for businesses that experience fluctuating workloads or need additional resources to cope with unexpected demand.
Challenges in Federated Cloud:
Resource Distribution:
One of the main challenges in federated cloud computing is the distribution of resources among multiple cloud service providers. This requires a scheme to ensure that incoming requests are distributed evenly among cloud providers.
Interoperability:
Increasing requests in cloud federation have resulted in more heterogeneous infrastructure, making interoperability an area of concern. Cloud users must be able to select the most relevant cloud service providers, but this can be difficult due to the different technologies used by various providers.
Seamless Integration:
A federated cloud requires seamless integration of people, devices, application interfaces and other entities. This is a challenge, as different cloud service providers may use different technologies and protocols.
Federated Cloud technologies:
OpenNebula: Cloud Computing Platform for Interoperability
OpenNebula is an open-source cloud computing platform that enables the management of heterogeneous distributed data center infrastructures. It leverages existing information technology assets to provide interoperability, protect investments, and provide a comprehensive Application Programming Interface (API).
Aneka Coordinator: Cloud Computing Platform for Interaction
Aneka is a cloud computing platform that provides the ability and performance needed to interact with other cloud services. Its features include Aneka services and Aneka peer components that help coordinate and link cloud services to create a high-performance cloud environment.
Eucalyptus: Open-Source Framework for Cloud Computing
Eucalyptus is an open-source framework that enables the pooling of computational, storage, and network resources. It enables applications to scale up or down as workloads change, providing a powerful and reliable cloud environment. Additionally, Eucalyptus provides a comprehensive set of cloud management tools to help coordinate the power of the cloud environment.