AWS CCP Study - Domain 1: Cloud Concepts

Cloud Concepts

Define AWS Cloud and its value proposition

Benefits of AWS cloud

• Security
  • cloud provider takes care of physical security
• Reliability
  • data backup
  • disaster recovery (durability)
    • recover from a disaster and prevent the loss of data
  • data replication
  • fault tolerance
    • the ability for the service to ensure there is no single point of failure, preventing the chance of failure
    • fail-over: have a plan to shift trafic to a redundant system in case the primary system fails
      • ex. having a secondary copy of the database which sync the ongoing changes, the secondary is not in-use until a fail over occurs to the primary database
• High Availablity
  • the ability for the service to remain available
  • no single point of failure/or ensure a certain level of performance
  • running the workload across multiple Availability Zones on AWS to secure its availability
• Elasticity
  • automatically increase or decrease the capacity based on current demand of traffic, memory and computing power
  • horizontal scaling:
    • out: add more servers of the same size
    • in: removing underutilized servers of the same size
  • vertical scaling is generally hard for traditional architecture, so only going to see horizontal described with elasticity
• Agility
• Pay-as-you go Pricing
  • no up-front cost
  • thousands of customers sharing the cost of the resources
• Scalability
  • increase or decrease resources and services based on demand
  • vertical scaling (scaling up): upgrade to a bigger server
  • horizontal scaling (scaling out): add more servers of the same size, which also add availability
• Global Reach
  • launch workloads anywhere in the world, just choose a region
• Economy of scale

  AWS allow users to focus on business value

• shifting technical resources to revenue-generating activities as opposed to managing infrastructure