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The terms IaaS, PaaS, and SaaS represent three main models of cloud services, each providing a different level of control, flexibility, and management for users, enabling businesses and developers to best meet their needs. Below is a brief overview of each:
1. Infrastructure as a Service (IaaS):
– Control and Flexibility: Offers the most when it comes to underlying infrastructure (servers, network technology, storage, and data center space). Users have control over operating systems, storage, and deployed applications. Some degree of networking configuration (e.g., host firewalls) might also be within the user’s control.
– Management Level: Users manage applications, data, runtime, middleware, and the OS. Providers manage virtualization, servers, hard drives, storage, and networking.
– Examples: Amazon Web Services (AWS) EC2, Google Compute Engine (GCE), and Microsoft Azure VMs are popular IaaS offerings.
2. Platform as a Service (PaaS):
– Control and Flexibility: Provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app. Users control applications and data, while everything else is managed by the provider.
– Management Level: Users manage applications and data; providers manage runtime, middleware, operating system, virtualization, servers, storage, and networking.
– Examples: Google App