S3 Storage Classes

S3 Storage classes:

Standard, IA, One Zone IA,  Intelligent Tiering,  Glacier.
Availability: Accessibility. Durability: Chances of data getting lost.

Standard

Built for 99.99% availability for the s3 platform.

99.9…..<11>9 % durability. 

Has Tiered storage available , Lifecycle management, versioning, Encryption, MFA Delete.

Designed to sustain loss of 2 facilities concurrently .

IA-  Infrequent availability

When accessed less frequently, but required rapid access when needed.

Charged a retrieval fee

99.9% availability

Durability: 99.<11>9%

One Zone -IA 

For Infrequently accessed data, Do not require multiple availability zone data  resilience

99.5% availability  over a given year.
99.99% durability.

It has lower availability. Generally not good for availability point of view.

Mostly for secondary backup[

RRS previously knowns as Reduced redundancy storage 
For Infrequently accessed data, Do not require multiple availability zone data  resilience
99.5% availability  over a given year.
99.99% durability.
It has lower availability. Generally not good for availability point of view.
Mostly for secondary backup[

S3 – Intelligent Tiering

Optimize cost automatically and optimised cost by changing tier based on the usage pattern.

99.9% availability

S3 Glacier:

• For archiving 
• Configure :Retrieval time from minutes to hours. Expedited retrival
• Lowest cost storage solution. Standand retrival 3 to 5 hours.
• Expedited - 1 to 5 mins , Standard - 3 to 5 hours, Bulk - 5 to 12 hours
• To easily deploy and enforce compliance controls on individual Glacier vaults via a lockable policy.
• A single archive can be as large as 40 terabytes.
• content of the archive is immutable,
• Under a single AWS account, you can have up to 1000 vaults.

S3 Glacier Deep Archive:

Retrieval time 12 hours , put in  a request, and they will provide in 12 hours. Lowest cost classes.

-Until 2018 there was a hard limit on S3 puts of 100 PUTs per second. To achieve this care needed to be taken with the structure of the name Key to ensure parallel processing. As of July 2018 the limit was raised to 3500 and the need for the Key design was basically eliminated. Disk IOPS is not the issue with the problem. The account limit is not the issue with the problem.

up to 100 buckets per AWS account. 

-The need to immediate access is an important requirement along with cost. Glacier has a long recovery time at a low cost or a shorter recovery time at a high cost, and 1Zone-IA has a lower Availability level which means that it may not be available when needed.

More: S3 FAQ