S3 Performance¶

Baseline performance¶

Amazon S3 automatically scales to high request rates, latency 100-200ms
Your application can achieve at least 3,500 PUT/COPY/POST/DELETE and 5,5,500 GET/HEAD requests per second per prefix in a bucket.
There are no limites to the number of prefixes in a bucket.
Example (object => prefix)
- bucket/folder1/sub1/file => /folder1/sub1
- bucket/folder1/sub2/file => /folder1/sub2
- bucket/1/file => /1/
- bucket/2/file => /2/
If you spread reads across all four prefixes evenly, you can achieve 22,000 requests per second for GET and HEAD.

If you use SSE-KMS, you may be impacted by the KMS limits
When you upload, it calls the GenerateDataKey KMS API
When you download, it calls the Decrypt KMS API
Count towards the KMS quote per second (5500, 10000, 30000 req/s based on region)
You can request a quote increase using Service Quotas Console

Multi-Part upload:
- Recommended for files > 100MB, must use for files > 5GB
- Can help parallelize uploads (speed up transfers)
S3 Transfer Acceleration
- Increase transfer speed by transferring file to an AWS Edge Location which will forward the data to the S3 bucket in the target region
- Compatible with multi-part upload