Give 3 examples of what S3 is used for.
- Backup and storage
- Disaster recovery
- Archive
- Hybrid cloud storage
- Application and media hosting
- Data lakes and big data analytics
- Software delivery
- Static websites
What really is a ‘bucket’?
A directory
At what level are buckets defined?
The region level
What is the key of an object?
Its full path after the bucket it is in, i.e. s3://my-bucket/my_folder1/another_folder/my_file.txt - everything after my-bucket/ in the above
If uploading more than XXGB, then you must use multi-part upload for S3.
5GB
What 3 additional bits of data might be added to an object?
- Metadata
- Tags
- A version ID
From which 2 orientations can security for S3 be controlled?
- User based (IAM)
- Resource based (bucket policies, object access control list)
What service do we use to allow other services to access S3 buckets (e.g. EC2 instances)?
IAM roles
What can help a user keep track of the current and historical data within a S3 bucket?
Versioning
When might a user use same region replication for S3?
- Live replication between production and test accounts
- Log aggregation
When might a user use cross region replication for S3?
- Compliance
- Lower latency access (increasing QoS)
- Replication across accounts
What are two things to watch out to enable when performing S3 replication?
- IAM permissions for S3 to be able to perform the replication
- Versioning must be enabled in both the source and destination buckets
What type of data storage would you use for gaming or big data analytics and why?
Standard - general purpose.
It has high throughput and low latency.
It is used for frequently accessed data.
Which storage type has extremely high durability in a single AZ, but is lost if that AZ is destroyed?
One zone - infrequent access
When would you use one zone - infrequent access?
Storing secondary backups of on-premise data, or data that you can recreate
Tell me about the availability, relative cost, and use cases of the standard - infrequent access class of data in S3.
99.9% availability
Cheaper than standard - general purpose
Used for disaster recovery and backups
What is glacier - flexible retrieval used for and why?
Low cost object storage for archives and storage.
It is cheap to store, and you are only charged for when you choose to retrieve objects.
Different levels of retrieval speed that you can have depending on your needs.
What are the 3 levels of retrieval speed for glacier - flexible retrieval?
- Expedited
- Standard
- Bulk
What are the 3 glacier tiers required for CCP?
- Instant retrieval
- Flexible retrieval
- Deep archive
What is the minimum storage duration for glacier - deep archive?
180 days
What is the minimum storage duration for glacier - instant retrieval and glacier - flexible retrieval?
90 days
Does durability change between S3 storage classes? What is/are the durability(ies)?
No, all storage classes have “11 9s” durability. This means that if you store 10,000,000 objects you can on average expect to lose a single object every 10,000 years.
Does availability differ by S3 storage class?
Yes! Standard - GP is 99.99%, whereas standard - IA is 99.9% and one zone - IA is 99.5% availability
What is the default encryption method used when sending S3 objects? What does this mean?
Server side encryption - this means that the server encrypts the file after receiving it
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