Introduction to S3 Flashcards
What is S3?
Secure, durable, highly-scalable object storage.
Can you host simple websites in S3?
Yes. S3 can host static web content.
Is S3 object or block storage?
Object
How does AWS host and scale data in the S3 service?
Data is spread across multiple devices and facilities.
What file size restrictions does S3 have? (how small/large can an object be?)
0 bytes to 5TB
Can two accounts have the same S3 bucket name?
No. S3 buckets are universal and each must be unique.
what HTTP code is given after a successful upload to S3?
200
what is the data consistency for PUTS of new objects?
read after write
What is the data consistency for overwrite PUTS and DELETES
Eventual consistency (can take some time to propagate)
How is data organized in S3
Key Value pairs
What is a Key in S3 object’s key/value pair?
The name of the file
What is the Value of an S3 object’s key/value pair?
The data of the object
In S3, how are file versions kept track of?
Version ID
In S3, can you add additional information about objects? How
Metadata. Usually as tags.
In S3, what is a subresource of an object?
bucket policies
cross origin resource sharing
transfer accelleration
What is S3’s availability design?
99.99%
What does Amazon gaurentee for S3 availabiltiy?
99.9%. S3 is designed for 99.99% (4x9), but gaurenteed at 99.9% (3x9).
What is Amazon gaurentee for S3 durability?
99.999999999% (11x9)
What is the difference between availability and durability?
Availability is the ability for data to be retrievable
Durability is protection from data loss or corruption
How many availability zone losses can S3 sustain?
2 concurrent availability zones.
Which S3 storage class is used for less frequently accessed data that still requires rapid access?
S3 - IA (Infrequently Accessed)
True or False: S3 - IA has retrieval fees?
True. Storage costs are lower than S3 standard, but come with a retrival fee when accessed.
What is S3 - One Zone?
Same as IA, but data is stored in a single availability zone, reducing availabilty to 99.5%. Lower storage cost
How much cheaper is S3 - One Zone than S3 - IA
20% cheaper
What is Glacier?
Very cheap data archival service.
What is the standard retrieval time for Glacier?
3-5 hours
What are the object storage classes that exist in AWS?
S3 standard S3 standard IA S3 onezone IA Glacier RRS - Reduced Redundancy Service; this is being depricated, and may or may not appear on the exam.
What S3 charges are there?
Storage per GB Requests Storage management Egress Transfer acceleration
What is S3’s storage limit
There is no limit on storage, only file sizes
Can you install operating systems or other software onto S3?
No.
What are S3 storage instances called?
Buckets
What is the use case for S3 standard?
need for durable, immediatly available and frequently accessed data
What are the core fundamental of an S3 object?
Key Value Version ID Metadata Subresources
True or False, you should read the S3 FAQ?
True. https://aws.amazon.com/S3/faqs
