AWS Developer Associate - 2

S3 - Simple Storage Service

1. for files/images/web pages
2. Fundamentals
1. Key
2. Value
3. Version
4. Metadata
5. Subresources - bucket specific configuration
1. Policies, ACL
2. CORS - Cross Origin Resource Sharing
3. Transfer Acceleration
3. object based, not block storage
4. HA, DR
5. file size: 0bytes to 5 TB
6. Unlimited Storage
7. HTTP 200 on successful upload
8. Data Consistency
1. Read after Write for PUTS of new objects
2. Eventual consistency for overwrite PUTS
9. Amazon guarantees 99.9% availability
10. Amazon guarantees 99.(11 9s) % durability
11. Tiers/Classes
1. Regular - can sustain the loss of 2 facilities concurrently
2. Infrequent Access - low fee, but charged for retrieval
3. OneZone - 99.5% availability, 20% less cost than regular
4. Reduced Redundancy Storage: 99.99% durability, ex for thumbnails, may be deprecated
5. Glacier: Cheap, optimized for infrequent access, takes 3-5 hours to restore data, archives
6. Intelligent Tiering - unknown access patterns, data not accessed for 30+ days, moved to infrequent, after access, moved to frequent tier, optimized cost
1. Frequent
2. Infrequent
12. Charged for:
1. Storage/GB
2. Requests
3. Storage mgmt - inventory/analytics/tags
4. Data mgmt - data taken out of S3
5. Transfer acceleration