Cheat sheetAWS-03

Storage & S3

AWS SAA / Storage & S3

Pick the storage service and class by matching durability, access pattern, and cost to the requirement.

11x9
S3 durability99.999999999% durability by design across Standard and IA/Glacier.
IA
Infrequent AccessLower storage cost + retrieval fee for rarely read objects.
EBS
Block volumeOne instance, one AZ — boot volumes and databases.
EFS
Shared fileNFS mounted by many instances across AZs concurrently.
⚑

Use lifecycle rules to transition cold objects to IA and then Glacier automatically.

Shared web assetsEFS mounted by an ASG fleet across 3 AZs for concurrent read/write.
Compliance archiveLifecycle → Glacier Deep Archive after 90 days for lowest-cost retention.
Lifecycle: Standard -> Standard-IA (30d) -> Glacier (90d)
One Zone-IA: same durability, single AZ, ~20% cheaper
Intelligent-Tiering: auto-move by access, no retrieval fees
s3ebsefsglacierlifecycledurability
review in 6d