General AWS

 Ec2 reserved instances 

Billed regardless of usage. Standard and convertible (can change instance family, OS etc). Sell in market place 

Provisoned iops

Provisioned IOPS volumes, backed by solid-state drives (SSDs), are the highest performance Elastic Block Store (EBS) storage volumes designed for your critical, IOPS-intensive and throughput-intensive workloads that require low latency.

DR strategy
1. Backup/restore RTO - hours 
2. Pilot light - RTO 10s of mins - some resources provisioned like ALB but no ec2, data is live
3. Warm standby - RTO mins - scaled down resources running for testing
4. Multi site active active 

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