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Cloud costs are your biggest expense after salaries. Pay-as-you-go is good for startups. Costs grow as you scale. Use a system to lower your bill. Keep your performance high.
Start with visibility. Measure everything.
- Use AWS Cost Explorer.
- Enable detailed billing.
- Tag resources by team and project.
- Check reports often.
Right-size your compute resources. Check CPU and memory with CloudWatch. Many instances have too much capacity.
- Downsize over-provisioned resources.
- Use auto-scaling to match demand.
Use Reserved Instances and Savings Plans. These lower costs for steady workloads.
- Commit to one or three years.
- Use these for your base load.
- Use on-demand for spikes.
Fix storage costs.
- Use S3 lifecycle policies.
- Move old data to Glacier.
- Delete unused EBS volumes.
- Use EFS only when you need it.
Lower data transfer costs.
- Use CloudFront.
- Keep services with heavy communication in one zone.
- Use VPC endpoints for API calls.
Use spot instances for flexible work. They are 60-90% cheaper than on-demand. AWS terminates them with two minutes notice. Use them for batch processing and stateless services.
Set budget alerts. Use anomaly detection.
- Get alerts for spending spikes.
- Fix problems before the next bill.