Community Cloud

A community cloud is a cloud infrastructure shared by several organizations with common concerns — such as security requirements, compliance needs, policy, or mission. It can be managed by one or more of the organizations, a third party, or a combination, and may exist on-premises or off-premises.

Community Cloud Architecture

Real-World Examples

Types of Community Cloud

1. Government Community Cloud

2. Healthcare Community Cloud

Organizations sharing HIPAA-compliant infrastructure.

3. Financial Services Community Cloud

Banks and financial institutions sharing PCI-DSS compliant platforms.

4. Research and Education Community Cloud

Universities pooling resources for scientific research.

Governance Model

Advantages

• Shared Compliance Costs: Certification costs split among members
• Industry-Specific Features: Tailored to community needs
• Trust: Members share similar security postures and concerns
• Cost Savings: Cheaper than individual private clouds
• Collaboration: Enables data sharing within the community

Disadvantages

• Limited Flexibility: Must conform to community standards
• Governance Complexity: Decision-making involves multiple organizations
• Scalability Constraints: Limited by collective capacity
• Slower Changes: Policy changes require community consensus
• Availability: Fewer provider options than public cloud

Community Cloud vs Other Models

Interview Questions

1. What is a community cloud and how does it differ from public and private clouds?

A community cloud is shared among organizations with common concerns (compliance, security, mission). Unlike public cloud (open to all) or private cloud (single organization), community cloud serves a specific group with shared governance and compliance requirements.

1. Give three real-world examples of community clouds.

AWS GovCloud (US government agencies sharing FedRAMP-compliant infrastructure), SWIFT network (financial institutions sharing secure messaging infrastructure), and university research clouds (academic institutions pooling computing resources).

1. What governance challenges exist in community clouds?

Multiple stakeholders must agree on policies, cost allocation, security standards, and operational decisions. This requires steering committees, SLAs, and consensus-building processes that can slow decision-making.

1. When is a community cloud the best deployment choice?

When multiple organizations in the same industry need shared compliance certifications (HIPAA, PCI-DSS, FedRAMP), want to split infrastructure costs, and benefit from collaboration while maintaining higher security than public cloud.

1. How are costs typically shared in a community cloud?

Through usage-based allocation (pay for what you consume), equal splits among members, tiered pricing based on organization size, or hybrid models combining base fees with usage charges.