Chapter 7: Beyond Cloud

Question 1

Name and explain the concepts when combining providers and models.

Answer 1

• Multi-cloud: Using multiple cloud providers in one application
• Federated Cloud: Integrating multiple cloud providers to provide a service
• Hybrid Cloud: Mixing public and private cloud models

Question 2

Explain the Motivation for Cloud Federation.

Answer 2

• Resilience against vendor outages
• Fighting vendor lock-in
• Harness the diversity of cloud services/ location by different providers

Question 3

Explain Policy-Enforcement.

Answer 3

Policy-awareness must be addressed at all cloud layers.

Traditional elasticity is not policy-aware.

Question 4

Explain data-streams of the IoT.

Answer 4

Various sensors deployed across factories and urban infrastructures, continuously recording data

Question 5

Name the critical performance requirements for IoT.

Answer 5

• performance (latencies, resource usage)
• reliability
• availability
• security

Question 6

Explain Edge and Fog Computing.

Answer 6

• From Edge to Fog to Cloud -> execution of tasks on resources in-between sensors and Clouds
• Processing in increasingly heterogeneous, widely distributed computing environments

Question 7

Characteristics of processing continuous streams.

Answer 7

• Low-latency processing of incoming data
• Flexible windows for aggregation
• Event time and out-of-order processing
• Stream processing guarantees