Module 6 — Storage

Status: ✅ done · Domain 3 · Full notes: Study hub → Storage · S3 deep dive · visual page Networking & Storage.

Key points

3 storage types: Block = EBS (disk for one EC2) · File = EFS/FSx (shared drive for many) · Object = S3 (web locker, infinite scale).
EBS vs EFS: EBS = one instance, one AZ, you size it · EFS = many instances, regional, auto-scales. (EBS hook = one Box · EFS = Fleet.)
Amazon S3 — object storage, 11 nines durability, multi-AZ, accessed by URL/API. Storage classes = one cost dial (same durability; differ on cost / retrieval speed / availability):
Standard · Intelligent-Tiering (unknown pattern, auto) · Standard-IA (infrequent, instant) · One Zone-IA (recreatable, 1 AZ) · Glacier Instant/Flexible/Deep Archive (archive, ms→hours).
Lifecycle policy = auto-move objects to cheaper classes over time.
Moving big data: Storage Gateway (hybrid on-prem↔AWS) · AWS Backup · Snow Family (cone < ball < mobile = ship data physically).

Triggers: unknown pattern → Intelligent-Tiering · recreatable/cheap → One Zone-IA · "auto move old data" → lifecycle policy.