cloud practitioner Flashcards
Five ways to pay for EC2 instanes
- On-Demand
- Savings Plans
- Reserved Instances
- Spot Instances
- Dedicated Hosts
ec2 Free tier
Includes 750 hours of linux and windows.t2.micro instances (t3.micro for regions without t2) each month for one year.
On-Demand payment model
No commitment, by the use instances.
- Low cost and flexibility without upfront pay/commit
- Apps with short-lived spiky or unpredictable work that cannot be interrupted
- Applications being developed or tested on EC2 for first time
Recommend ec2 payment model for: user is is cost sensitive and requires flexibility. User doesn’t want to pay upfront or commit
On-demand
Recommend ec2 payment model for: App is short-lived and spiky or unpredictable work and must not be interrupted
On-demand
Recommend ec2 payment model for: App is being developed and tested for the first time on EC2
On-demand
Spot instance payment model
Request spare Ec2 for up to 90% off demand price. Recommended for
- Applications that have flexible start and end times
- Apps that are only feasible at very low compute prices
- Users with urgent computing needs for large amounts of additional capacity
Recommend ec2 payment model for: App that has flexible start and end times
Spot instances
Recommend ec2 payment model for: Apps that are only feasible at very low compute prices
Spot instances
Recommend ec2 payment model for: Users with urgent computing needs for large amounts of additional capacity
Spot instances
Savings Plans payment model
Flexible pricing model that offers low prices on EC2 and fargate usage. In exchange for a commitment to a consistent amount of usage for a 1 or 3 year term. save up to 72%.
Reserved instances
Significate discount (up to 75%) compared to on-demand instance pricing. when assigned to a specific AZ they provide a capacity reservation giving you additional confidence in ability to launch instances when needed.
- Apps with steady state usage
- Apps that may require reserved capacity
- Customers that can commit to using Ec2 over a 1 or 3 year term to reduce total costs
Recommend ec2 payment model for: Apps with steady state usage
Reserved Instances
Recommend ec2 payment model for: Apps that may require reserved capacity
Reserved instances
Recommend ec2 payment model for: Customers that can commit to using ec2 over 1 or 3 year term
Reserved instances and/or Savings plan.
Savings plan can only do compute or lambda but not rdb or other fancy services
Dedicated Hosts
A dedicated physical ec2 server for your use. Use existing server bound licenses, including windows server, sqlserver and suse linux enterprise server. also good for compliance.
- Can be on-demand (hourly)
- can be purchased as a reservation for up to 70% off the on-demand price
Recommend ec2 payment model for: already have server bound licenses
Dedicated Host
Recommend ec2 payment model for: customer is able to commit to 1 or 3 years of running RDS
Reserved Instance
Recommend ec2 payment model for: Customer is able to commit to 1 or 3 years of running lambda
Savings plan
5 pillars of Well Architected Framework
operational excellence, Security, Reliability, Performance Efficiency, Cost Optimization
Well Architected Framework Pillar: Operational Excellence
biz value
Well Architected Framework Pillar: Security
Protect information and assets
Well Architected Framework Pillar: Reliability
failure tolerance
Well Architected Framework Pillar: Performance
maximize resource to biz value
