S3 Standard vs S3 IA vs S3 Glacier: Key Differences and Usage

Amazon S3 Standard is for frequently accessed data with low latency, S3 Infrequent Access (IA) is for data accessed less often but requires rapid retrieval, and S3 Glacier is for long-term archival with slower retrieval times and lower cost. Each offers different pricing and access speeds to fit storage needs.

Quick Comparison

Here is a quick overview comparing key factors of S3 Standard, S3 IA, and S3 Glacier.

Factor	S3 Standard	S3 Infrequent Access (IA)	S3 Glacier
Access Frequency	Frequent	Infrequent	Rare/Archival
Retrieval Time	Milliseconds	Milliseconds	Minutes to Hours
Storage Cost	Highest	Lower than Standard	Lowest
Retrieval Cost	Lowest	Higher than Standard	Highest
Durability	99.999999999% (11 9's)	99.999999999% (11 9's)	99.999999999% (11 9's)
Use Case	Active data, websites, apps	Backup, disaster recovery	Long-term archives, compliance

Key Differences

S3 Standard is designed for data that you access frequently and need immediately. It offers low latency and high throughput performance, making it ideal for websites, content distribution, and big data analytics.

S3 Infrequent Access (IA) is for data that is accessed less often but still requires quick retrieval when needed. It has lower storage costs than Standard but charges for data retrieval, making it cost-effective for backups and disaster recovery.

S3 Glacier is optimized for long-term data archiving where retrieval times of minutes to hours are acceptable. It offers the lowest storage cost but higher retrieval costs and delays, suitable for compliance archives and digital preservation.

Code Comparison

Example AWS CLI command to upload a file to S3 Standard storage class.

bash

aws s3 cp example.txt s3://my-bucket/ --storage-class STANDARD

Output

upload: ./example.txt to s3://my-bucket/example.txt

S3 Infrequent Access Equivalent

Example AWS CLI command to upload the same file to S3 Infrequent Access storage class.

bash

aws s3 cp example.txt s3://my-bucket/ --storage-class STANDARD_IA

Output

upload: ./example.txt to s3://my-bucket/example.txt

When to Use Which

Choose S3 Standard when you need fast, frequent access to your data with minimal retrieval cost.

Choose S3 Infrequent Access when your data is accessed less often but still requires quick retrieval, balancing lower storage cost with retrieval fees.

Choose S3 Glacier for long-term storage of data that you rarely access and can tolerate retrieval delays, maximizing cost savings.

Key Takeaways

S3 Standard is best for frequently accessed data needing instant retrieval.

S3 IA lowers storage cost but charges for retrieval, suited for infrequent access.

S3 Glacier offers the cheapest storage for archival with slower access times.

All three provide the same high durability of 11 nines.

Pick storage class based on access frequency, cost, and retrieval speed needs.