Review

What are the 3 main layers of a typical cloud? Give examples of AWS services in each layer. Which ones do your PAs use?

• IaaS: S3, Lambda, EC2
• PaaS: Redshift, DynamoDB
• SaaS: sagemaker, ground truth

What is a benefit of separating PaaS from SaaS in cloud?

• PaaS: users have more control over the development and deployment of their applications
• SaaS: ready-made solutions with less customization options.

Briefly explain 1 pro and 1 con of Shared Disk Parallelism vs Shared Nothing Parallelism.

• Pro: all nodes can access same data
• Con: communication between nodes can become complex

Briefly explain 1 pro and 1 con of On-Demand vs Spot instances on AWS.

• On Demand
  • Pro: no upfront commitment
  • Con: possibly more expensive since it is not reserved
• Spot
  • Pro: cost effective for expectedrecurring usage
  • Con: Workloads can be interrupted if the spot price exceeds the bid price or if AWS reclaims the instance

What is so great about the serverless cloud anyway?

• automatic scaling
• pay-per-execution pricing
• reduced operational overhead
• faster time-to-market for applications by abstracting away infrastructure management tasks

What is so great about resource disaggregation in future clouds?