MLOps Training

Appearance

Domain 4: Billing, Pricing, and Support ​

CLF-C02 Exam Domain 4 | 12% of Scored Content

Learning Objectives ​

By the end of this domain, you will be able to:

  • Understand AWS pricing models
  • Compare On-Demand, Reserved, and Spot pricing
  • Use AWS TCO Calculator and Cost Explorer
  • Understand AWS Free Tier
  • Compare AWS support plans
  • Identify cost optimization strategies

AWS Pricing Models ​

Overview ​

AWS offers multiple pricing models to provide flexibility and cost savings.

Comparison Table ​

Pricing ModelCommitmentDiscountUse CaseBest For
On-DemandNone0%Flexible workloadsShort-term, unpredictable
Reserved1-3 yearsUp to 75%Steady-state workloadsProduction, predictable
SpotNoneUp to 90%Fault-tolerantBatch, interruptible
Savings Plans1-3 yearsUp to 72%Consistent usageFlexible alternative to RIs

On-Demand Pricing ​

Characteristics:

  • Pay for what you use, by the second or hour
  • No long-term commitment
  • Highest cost, maximum flexibility
  • No upfront payment

Pricing Examples:

  • EC2: Pay per hour/second
  • S3: Pay per GB/month + requests
  • Lambda: Pay per request + compute time

Use Cases:

  • Development/testing
  • Short-term projects
  • Applications with unpredictable usage
  • Getting started quickly

Reserved Instances (RIs) ​

Overview ​

Reserved Instances provide significant discount compared to On-Demand pricing.

RI Payment Options ​

OptionDescriptionSavings
All UpfrontPay full amount upfrontHighest discount
Partial UpfrontPay portion upfront, rest monthlyMedium discount
No UpfrontPay monthly over termLower discount

RI Term Lengths ​

TermDescription
1-YearStandard 1-year commitment
3-YearStandard 3-year commitment
ConvertibleCan change instance attributes

Reserved Instance Types ​

TypeScopeFlexibility
StandardRegionalSame AZ, instance type, OS
ConvertibleRegionalChange attributes during term
ScheduledSpecific timeReservations for time windows

Use Cases ​

  • Production workloads
  • Steady-state usage (at least 75% of the time)
  • Long-term applications
  • Database workloads

Break-even Analysis: Generally break even at ~30-40% utilization for 1-year RI

Savings Plans ​

Overview ​

Savings Plans offer flexible pricing model with lower prices than On-Demand.

Types ​

TypeScopeDiscountUse Case
Compute Savings PlansEC2, Fargate, LambdaUp to 66%Flexible compute usage
EC2 Instance Savings PlansEC2 instances in regionUp to 72%EC2-specific commitment

Savings Plans vs Reserved Instances ​

FeatureSavings PlansReserved Instances
FlexibilityHigh (any instance, any size)Low (specific attributes)
DiscountUp to 66-72%Up to 75%
CommitmentHourly spend commitmentInstance commitment
Use CaseVariable workloadsStable, predictable workloads

Spot Instances ​

Overview ​

Spot Instances use spare EC2 capacity at up to 90% discount.

Characteristics ​

FeatureDescription
PriceBased on supply and demand
Interruption2-minute warning before termination
PricingUp to 90% discount
AvailabilityNot guaranteed

Spot Pricing ​

Spot Price: Current market price (changes based on supply/demand)

Maximum Price: Your bid price (can be On-Demand price)

When Interrupted:

  • Spot price exceeds your maximum price
  • AWS needs capacity back

Use Cases ​

  • Batch Processing: Data processing, simulations
  • Big Data: EMR clusters, Hadoop jobs
  • Containerized Workloads: ECS, EKS
  • CI/CD: Build and test pipelines
  • Web Crawling: Distributed web scraping

Spot Best Practices ​

  1. Use Spot Fleets: Combine multiple instance types
  2. Fault-Tolerant Design: Handle interruptions gracefully
  3. Checkpoints: Save progress periodically
  4. Diversify: Use multiple instance types and AZs

AWS TCO Calculator ​

Overview ​

TCO Calculator compares on-premises costs to AWS costs.

What It Includes ​

Cost CategoryOn-PremisesAWS
HardwareServers, storagePay per use
SoftwareLicensesIncluded (Linux) or pay (Windows)
Power & CoolingElectricityIncluded
IT LaborAdministrationReduced (managed services)
Data CenterFacility costsIncluded

Using the Calculator ​

  1. Select Workload Type: Web apps, databases, analytics
  2. Input Current Infrastructure: Servers, storage, network
  3. Adjust Assumptions: Electricity cost, labor hours
  4. Compare Results: 1-year, 3-year, 5-year projections

Link: https://aws.amazon.com/tco-calculator/

Cost Explorer ​

Overview ​

Cost Explorer provides visualization and analysis of AWS costs.

Features ​

FeatureDescription
Cost & UsageView costs by service, region, tag
ForecastingPredict future costs
Anomaly DetectionUnusual spending alerts
Cost Allocation TagsTag resources for cost tracking
Reservation CoverageRI utilization tracking

Cost Allocation Tags ​

Purpose: Organize and track costs.

Best Practices:

  • Tag all resources (Environment, Project, Owner, CostCenter)
  • Use tag policies for compliance
  • Enable cost allocation tags

Common Tags:

  • Environment: Production, Development, Test
  • Project: Project name
  • Owner: Team or person
  • CostCenter: Business unit

AWS Free Tier ​

Overview ​

AWS Free Tier offers free services for 12 months.

Free Tier Offers ​

OfferDescription
12 Months Free750 hours/month EC2 (t2.micro/t3.micro)
Always Free1 million Lambda requests, 25 GB DynamoDB
Trials60-day free trials for some services
ServiceFree Tier LimitDuration
EC2750 hours/month (t2.micro or t3.micro)12 months
Lambda1 million requests/month + 400,000 GB-secAlways
S35 GB storage, 20,000 requestsAlways
RDS750 hours/month (db.t2.micro/db.t3.micro)12 months
DynamoDB25 GB storage, 200 WCUs, 200 RCUsAlways
CloudFront1 TB data transfer12 months

Important Notes ​

  • Per Account: Limits apply to entire account
  • Per Region: Some services have per-region limits
  • Monitoring: Watch for usage beyond free tier
  • Upgrade: Free tier expires after 12 months for some services

AWS Support Plans ​

Overview ​

AWS Support Plans provide technical and operational support.

Comparison Table ​

FeatureBasicDeveloperBusinessEnterprise
CostFree$29/month$100/month$15,000/month
Response TimeBest effort24 hours< 1 hour (critical)< 15 minutes (critical)
Trusted Advisor7 checks7 checksFull accessFull access
Customer ServiceCommunityEmailPhone, ChatPhone, Chat, TAM
Architecture Review--1/year2/year
Case Severity1-51-51-51-5
API SupportNoNoYesYes

Severity Levels ​

SeverityDescriptionResponse Time (Business)
1 (Critical)Production system down< 1 hour
2 (High)System impaired< 4 hours
3 (Medium)Minor impact< 12 hours
4 (Low)General questions< 24 hours

Trusted Advisor ​

Purpose: Automated service recommendations.

Categories:

CategoryChecks
Cost Optimization20+ checks for cost savings
Performance20+ checks for performance
Security40+ checks for security gaps
Fault Tolerance20+ checks for HA
Service LimitsCheck approaching limits

Basic vs Full Access:

  • Basic: 7 core security checks
  • Business/Enterprise: All checks, actionable recommendations

Cost Optimization Strategies ​

1. Right-Sizing ​

What: Use appropriately sized instances.

How:

  • Use AWS Compute Optimizer
  • Review CloudWatch metrics
  • Test different instance types

Savings: 10-50% reduction

2. Use Reserved Instances or Savings Plans ​

What: Commit to usage for discounts.

How:

  • Analyze usage patterns in Cost Explorer
  • Purchase RIs or Savings Plans for steady workloads

Savings: Up to 75%

3. Use Spot Instances ​

What: Use spare capacity for fault-tolerant workloads.

How:

  • Batch jobs, big data, containerized workloads
  • Implement fault tolerance

Savings: Up to 90%

4. Delete Unused Resources ​

What: Remove unused instances, volumes, load balancers.

How:

  • Use AWS Trusted Advisor
  • Regular cleanup processes

Savings: Variable

5. Use Lifecycle Policies ​

What: Move data to cheaper storage over time.

How:

  • S3 lifecycle policies (Standard → IA → Glacier)
  • EBS snapshot lifecycle policies

Savings: 40-60% on storage

6. Monitor and Set Alerts ​

What: Track costs and receive alerts.

How:

  • AWS Budgets
  • Billing alerts
  • Cost Explorer forecasts

Savings: Prevent overspending

Exam Tips - Billing, Pricing, and Support ​

High-Yield Topics ​

  1. Pricing Models:

    • On-Demand = No commitment, highest cost
    • Reserved = 1-3 years, up to 75% savings
    • Spot = Up to 90% savings, interruptible
    • Savings Plans = Flexible, up to 72% savings

  2. TCO Calculator:

    • Compare on-premises to AWS
    • Includes hardware, software, power, labor, facilities

  3. Cost Explorer:

    • View costs by service, region, tag
    • Forecasting and anomaly detection
    • Cost allocation tags

  4. Free Tier:

    • 12 months for some services (EC2, RDS)
    • Always free for others (Lambda, S3 limited)
    • Per account, not per user

  5. Support Plans:

    • Basic = Free, community support
    • Developer = $29/month, email support
    • Business = $100/month, phone support, full Trusted Advisor
    • Enterprise = TAM, architecture reviews

  6. Trusted Advisor:

    • Cost, Performance, Security, Fault Tolerance, Service Limits
    • 7 checks free (Basic), full access (Business+)

Additional Resources ​

DigitalCloud Training Cheat Sheets ​

Official AWS Documentation ​

AWS Cost Management Resources ​

Course Completion ​

Congratulations! You've completed the AWS Cloud Fundamentals (CLF-C02) module.

Final Exam Tips ​

  1. Focus on High-Weight Domains: Security (30%) and Services (34%)
  2. Memorize Service Comparisons: Know when to use each service
  3. Understand Shared Responsibility: Most important concept
  4. Practice with AWS Free Tier: Hands-on experience
  5. Take Practice Exams: Assess your readiness

Next Steps ​

  1. Explore AWS Free Tier: Get hands-on experience
  2. Take Practice Exams: AWS Skill Builder
  3. Schedule Your Exam: When you feel ready
  4. Join Study Groups: Engage with AWS community

Good luck with your journey!

Released under the MIT License.

Copyright © 2026-present