Differences and relationships between IAAs, paas, and SAAS in cloud computing

Concept:

IASs: Infrastructure (infrastructure)-as-a-service,

PAAs: Platform (Platform)-as-a-service,

SAAS: Software-as-a-service.

Differences:

Different service levels

IASs: hardware, Virtual Machine

PAAs: Operating System and middleware (such as MySQL, nosql storage support, Apach server, and PHP parser)

SAAS: applications, data (such as Gmail email system)

The following figure shows the differences between the three modes:

Contact:

It is three cloud computing models, or three layers;

Cloud computing aims to simplify it support implementation;

There is no obvious limit. from I to P to S, the workload and difficulty requirements for the application are gradually reduced, the degree of hosting is gradually increased, but the flexibility is also gradually reduced.

Differences and relationships between IAAs, paas, and SAAS in cloud computing