AWS Cloud Storage Summary

Storage Summary

• S3 is Object Base storage.
• 0b - 5 Tb filesize
• Files are stored in buckets.
• Bucket names are universal.
• Read after write consistency for PUTS.
• Overwrite PUTs and DELETEs take some time to propagate.

Storage tiers

• S3 Standard 11x9 durability 2x9 availability.
• S3 - IA (You want low cost, but fast retrieval times)
• S3 One Zone - IA. (Not across multiple facilities)
• Glacier -> Expedited, Standard and Bulk

S3 Fundamentals

• Key-Value
• Version ID
• Metadata
• Access Control Lists

Bucket URL format:

http://s3-eu-west-1.amazonaws.com/mybucket

S3 Versioning

• Stores all versions
• Great Backup
• Once enabled cannot be disabled
• Versions MFA Delete capability.
• Cross Region Replications

S3 Cross Region replication.

1. Versioning must be enabled (source + destination).
2. Regions must be unique.
3. Existing Files are not replicated(new files are replicated).
4. Delete markers are replicated.
5. Deleting versions or markers are not replicated.

Lifecycle Management

1. Can be used with versioning
2. Can be applied to current and previous versions
3. Trasnitions
   • Standard - Infrequent Access Storage Class
   • Glacier
   • Permantly Delete