What is a storage class? What storage classes are there?

Difficulty: unrated

Answer

Each object has a storage class assigned to, affecting its availability and durability. This also has effect on costs. Storage classes offered today:

Standard:
- Used for general, all-purpose storage (mostly storage that needs to be accessed frequently)
- The most expensive storage class
- 11x9% durability
- 2x9% availability
- Default storage class
Standard-IA (Infrequent Access)
- Long lived, infrequently accessed data but must be available the moment it's being accessed
- 11x9% durability
- 99.90% availability
One Zone-IA (Infrequent Access):
- Long-lived, infrequently accessed, non-critical data
- Less expensive than Standard and Standard-IA storage classes
- 2x9% durability
- 99.50% availability
Intelligent-Tiering:
- Long-lived data with changing or unknown access patterns. Basically, In this class the data automatically moves to the class most suitable for you based on usage patterns
- Price depends on the used class
- 11x9% durability
- 99.90% availability
Glacier: Archive data with retrieval time ranging from minutes to hours
Glacier Deep Archive: Archive data that rarely, if ever, needs to be accessed with retrieval times in hours
Both Glacier and Glacier Deep Archive are:
- The most cheap storage classes
- have 9x9% durability