S3 Storage

Question 1

What are S3 use cases?

Answer 1

• Backup / Archive
• Disaster recovery
• Hybrid cloud storage
• Application hosting
• Media hosting
• Big data
• Software delivery
• Static web site

Question 2

S3 Overview - Buckets

Answer 2

• Objects (files) stored in buckets
• Buckets have globally unique name
• Defined at region level - but stored in 3 AZs
• Follow naming convention

Question 3

S3 Overview - Objects

Answer 3

• Objects (files) have a key
• Key is the full path: bucket + file name
  s3: //my-bucket/m-file.txt
• There are no folders/directories in buckets, just looks that way

Question 4

How are S3 buckets secured ?

Answer 4

• User based (IAM policies, user with AWS account)
• Resource based - bucket policies (allow public access, cross account access)
• Access by EC2 instance requires IAM role
• Encryption

Question 5

What security/control is based on S3 Bucket Policies ?

Answer 5

• JSON based
• Grant public access
• Force encryption at upload
• Grant cross account access

Question 6

S3 Web Site

Answer 6

• Setting to use as web site
• URL: .s3-website-.amazon.aws.com
• Make sure bucket policy allow for public access or else 403 error happens

Question 7

S3 Versioning

Answer 7

• Enabled at bucket level
• Version incremented at overwrite
• Versioning is best practice
• Delete markers
• null version for files added before enabling versioning
• Suspending versioning does not delete previous entries

Question 8

What are S3 Access Logs

Answer 8

• Used for access/request auditing
• a ‘data’ bucket is configured to use a ‘logging’ bucket (use Edit Server Access Logging to enable)
• logs are written to logging bucket and analysed using AWS tools

Question 9

What are types of S3 replication and use cases?

Answer 9

• CRR - Cross Region Replication
  
  • use: compliance, across accounts, lower latency
• SRR - Same Region Replication
  
  • use: log aggregation, live replication between prod and test
• must enable versioning in source and target buckets
• must have proper IAM permissions

Question 10

What are the S3 Storage Classes

Answer 10

• S3 Standard - General purpose
• S3 Standard - Infrequent Access (IA)
• S3 One Zone - Infrequent Access
• S3 Intelligent Tiering
• Glacier
• Glacier Deep Archive

Question 11

S3 Durability / Availability

Answer 11

• High durability across all classes

- Availability varies on class

Question 12

S3 Standard Use Case

Answer 12

• 99.99% Availability
• Frequently accessed data
• low latency / high throughput
• sustain 2 concurrent facility failures
• Big data analytics, mobile and gaming, content distribution

Question 13

S3 Standard - Infrequent Access

Answer 13

• 99.9% Availability
• For data that is less frequently accessed, but requires rapid access when needed
• Lower cost, but has retrieval fee
• Stored in multiple AZ’s
• Use: disaster recover. Backups

Question 14

S3 Intelligent Tiering

Answer 14

• 99.9% Availability
• Low latency / high throughput like S3 standard
• Moves between 2 access tiers - S3 Standard and S3 Standard IA
• Good for backups / disaster recovery files
• Cost optimized - automatically moves objects based on access patters (frequent access/Infrequent access)
• No retrieval fees

Question 15

S3 One-Zone Infrequent Access

Answer 15

• 99.5 availability (lower because in single AZ, not redundant)
• Same as IA but single AZ
• Lower cost that Standard IA
• Use: storing secondary backup, data that can be recreated

Question 16

Glacier and Glacier Deep Archive

Answer 16

• Low cost meant for archiving
• Long term data retention
• Low cost + retrieval fees
• Glacier tiered up to 12 hours retrieval
• Deep archive 12-48 hours retrieval

Question 17

S3 Moving Data between Classes

Answer 17

• Can be configured to optimize cost
• Automated through lifecycle configuration. Set on bucket / Create lifecycle rule
• can move through all tiers and ultimately delete the data

Question 18

What are Snowcone, Snowball Edge and Snowmobile. What is Edge computing

Answer 18

• Snowcone - Small portable device. 8 TB. Edge capable
• Use case- data collected where there is not network
• Snowball Edge - TBs or PBs of data. Can process the data while it is being moved. Edge capable
• Storage Optimized (80 TB)
• Compute Optimized (42 TB)
• Snowmobile - truck that moved exabytes of data
• Edge Computing - process data at location with no internet/cloud access

Question 19

AWS Storage Gateway

Answer 19

• Hybrid cloud storage
• Bridge between on-premise and S3 cloud storage
• On-premise can seamlessly access S3
• Use - disaster recovery, backup/restore, tiered storage

Question 20

What is OpsHub?

Answer 20

• Manage Snowball devices graphically