S3 Flashcards
What is Amazon S3?
Amazon S3 is a object storage.
Durable, highly available, and scalable.
Costs are aligned with usage.
What kind of data can I store in Amazon S3?
Any type of data - yet, it is used for storing and retrieving. Not for database access or a file system.
How much data can I store in Amazon S3?
The total volume of data and number of objects are unlimited.
Individual objects can range in size from a minimum of 0 bytes to a maximum of 5 terabytes.
The largest object that can be uploaded in a single PUT is 5 gigabytes.
For objects larger than 100 megabytes, customers should consider using the Multipart Upload capability.
What storage classes does Amazon S3 offer?
S3 Standard: general-purpose storage of frequently accessed data;
S3 Standard-Infrequent Access (S3 Standard-IA): Storing is cheaper – but retrieval costs higher.
S3 One Zone-Infrequent Access (S3 One Zone-IA): Only available in one AZ
Amazon S3 Glacier (S3 Glacier): Cheap storage but minutes to hours to retrieve
Amazon S3 Glacier Deep Archive (S3 Glacier Deep Archive): Cheap storage but minutes to hours to retrieve
How are files organized?
Assign a unique object key that can later be used to retrieve the data.
Keys can be any string, and they can be constructed to mimic hierarchical attributes.
Alternatively, you can use S3 Object Tagging to organize your data across all of your S3 buckets and/or prefixes.
How reliable is Amazon S3? (Availability)
S3 Standard: 99.99% availability
S3 Standard-IA: 99.9% availability
S3 One Zone-IA: 99.5% availability
Does Amazon S3 offer a Service Level Agreement (SLA)?
Yes. The Amazon S3 SLA provides for a service credit if a customer’s monthly uptime percentage is below our service commitment
Where is my data stored?
You specify an AWS Region when you create your Amazon S3 bucket.
S3 Standard, S3 Standard-IA, and S3 Glacier stored across multiple devices spanning a minimum of three Availability Zones
S3 One Zone-IA storage class are stored redundantly within a single Availability Zone in the AWS Region you select.
What is an AWS Region?
Geographic location where AWS provides multiple, physically separated and isolated Availability Zones which are connected with low latency, high throughput, and highly redundant networking.
Example: EU Frankfurt (eu-central-1)
What is an AWS Availability Zone (AZ)?
Isolated location within an AWS Region each separated by miles to protect against local events like fires, floods, etc.
How do I decide which AWS Region to store my data in?
- is near to your customers, your data centers, or your other AWS resources in order to reduce data access latencies.
- is remote from your other operations for geographic redundancy and disaster recovery purposes.
- enables you to address specific legal and regulatory requirements.
- allows you to reduce storage costs. You can choose a lower priced region to save money.
How will I be charged my use of Amazon S3?
- Storage Used
- Network Data Transferred In
- Network Data Transferred Out
- Data Requests
- Data Retrieval (for IA classes)
How is my data secured in Amazon S3?
- Upon creation, only the resource owners have access to Amazon S3 resources they create.
- Amazon S3 supports user authentication to control access to data.
- You can use access control mechanisms such as bucket policies and Access Control Lists (ACLs) to selectively grant permissions
- You can securely upload/download your data to Amazon S3 via SSL endpoints using the HTTPS protocol.
- If you need extra security, you can use the Server-Side Encryption (SSE) option to encrypt data stored at rest.
- You can configure your Amazon S3 buckets to automatically encrypt objects before storing them if the incoming storage requests do not have any encryption information.
- Alternatively, you can use your own encryption libraries to encrypt data before storing it in Amazon S3.
How durable is Amazon S3?
Amazon S3 Standard, S3 Standard–IA, S3 One Zone-IA, and S3 Glacier are all designed to provide 99.999999999% (nine 9s) durability.
What is S3 Intelligent-Tiering?
- Automatic cost savings by moving objects between two access tiers when access patterns change.
- One tier is optimized for frequent access and the other lower-cost tier is designed for infrequent access.
- Objects uploaded or transitioned to S3 Intelligent-Tiering are automatically stored in the frequent access tier.
- S3 Intelligent-Tiering works by monitoring access patterns and then moving the objects that have not been accessed in 30 consecutive days to the infrequent access tier. If the objects are accessed later, S3 Intelligent-Tiering moves the object back to the frequent access tier.
