Terminology

Vault : Container for Archives. 1k Vualts per account
Archives: Basic Unit of backup. 40TB Max per archieve. No limit on number of archives.
Inventory: Cold index of archives (refresh every 24 hours)

Access Glacier

SDK / API
S3 Lifecycle (Bucket Level or Object Level)

new feature: Archive S3 object by tag

3rd party tools & Gateways

Upload to glacier

Make use of description to persist metadata (in case local index is corrupted)
Aggregate data into MBs , small data will have loads of overhead when persist into glacier
Consider to persist file checksum with index locally ;
Consider to persist file offset when files are aggregated, this helps to retrive data using range head
Use multi-part upload

Data Management

Vault Tag
- View billing by tag; config security by tag
Integrate with CloudTrail
Vault access policies: easy to control access and share content with other account
Vault Lock : 24hours cooling down / test period
Vault Access Policy : give more flexibility compare to Vault lock. For example, make use of the Legal Hold tag on the vault

Retrievals

Steps to retrieve data

Step 1, request a job (which vault , which archive id, what range)
Step 2, processing (depending type of request, can be minutes or hours)
Step 3, Job completion notification
Step 4, Download the data

Restore via S3 Lifecycle

Request a file restore

3 Options: Expedited --> Standard --> Bulk (cheapest, 12 hours for peta bytes)

Reference

Deep Dive Glacier
https://youtu.be/l8ug62pVbtw