S3 Exam Tips (dev)
- S3 is a
Object-Basedstorage that allows you to upload files - Not OS or run a DB storage
- Files from 0 bytes up to
5TB - The total value of data and number of objects you can store is
unlimited - Files are stored in buckets
- S3 is a global namespace, this means that the buckets must be globally available
- A S3 Object consists in
Value,Key,Version IDandMetadata
Secure Buckets
- By default every bucket is
private(only the owner can read, delete or upload) - You can use
Bucket Policiesthat are applied at a bucket level - You can use
Access Control Lists (ACLs)that are applied at a object level - S3 buckets can be configured to create
Access Logs(disabled by default), which will log all requests made to a bucket. These logs can be written to another bucket.
Tiers
| Storage Class | AZ | Use Case |
|---|---|---|
| S3 Standard | 3 | Suitable for most workloads, e.g. websites, content distribution, mobile and gaming applications, and big data analytics. |
| S3 Standard-Infrequent Access | 3 | Long-term, infrequently accessed critical data, e.g. backups, data store for disaster recovery files, etc. Min storage duration: 30 days. |
| S3 One Zone-Infrequent Access | 1 | Long-term, infrequently accessed non-critical data. Min storage duration: 30 days. |
| S3 Glacier | >= 3 | Long-term data archiving that occasionally needs to be accessed withing a few hours or minutes. Min storage duration: 90 days. |
| S3 Glacier Deep Archive | >= 3 | Rarely accessed data archiving with a default retrieval time of 12 hours. Min storage duration: 180 days. |