S3

Question 1

S3 Facts

Answer 1

Objects stay within an AWS region and are synced across all AZ’s for extremely high availability and durability.

Question 2

S3 Objects

Answer 2

each object must be assigned a storage type, which determines the object’s availability, durability, and cost.

Question 3

S3 Foolders

Answer 3

FOR SIMPLICITY, S3 supports the concept of “folders”.
This is done only as a means of grouping objects.
amazon s3 does this by using key-name prefixes for objects.
S3 has a flat structure, there is no hierarchy like you would see in a typical file system.

Question 4

S3 permissions

Answer 4

• • all buckets and objects are private by default
• • The resources owner can grant access to the resource through S3 “resource based policies” or a traditional IAM user policy

Question 5

Bucket policies

Answer 5

• only attached to the S3 bucket.
• the permissions in the policy are applied to all objects in the bucket.
• The policy specifies what actions are allowed or denied for a particular user of that bucket.

Question 6

S3 access control lists

Answer 6

• grant access to users in other AWS accounts or to the public.
• Both buckets and objects has ACLs.
  Object ACLs allow us to share an S3 object with the public via a URL link.

Question 7

S3 Versioning

Answer 7

on bucket level.

Question 8

Lifecycle policies

Answer 8

a set of rules that automate the migration of an object’s storage class to a different storage class(or deletion), based on specified time intervals.

Question 9

S3 event Notifications

Answer 9

S3 events notification allow you to setup automated communication between S3 and other AWS services when a selected event occurs in an S3 bucket.

Question 10

Common event notification triggers

Answer 10

RRSObjectLost

ObjectCreated – Put, Post, Copy, COmpleteMultiPartUpload, Delete, Delete Marker Created, Object delete.

Question 11

Events notification sends to AWS service

Answer 11

SNS, SQS, Lambda.

Question 12

Static Web Hosting

Answer 12

route 53 can also map huma-readable domain name to static web hosting buckets, which are ideal for DNS failover solutions.

Question 13

CORS

Answer 13

is a method of allowing a web application located in one domain to access and use resources in another domain.
- This allows web applications running javascript or HTML5 to access resources in an S3 bucket without using a proxy server.

Question 14

Storage Gateway

Answer 14

Connects local data center software appliance to cloud based storage such as Amazon S3.

Question 15

Gateway-Cached Volumes

Answer 15

• -Create storage volumes and mount them as iSCSI devices on the on-premise servers.
• -The gateway will store the data written to this volume in Amazon S3 and will cache frequently access data on-premise in the storage device.

Question 16

Gateway-Stored Volumes

Answer 16

• -Store all the data locally(on-premise) in storage volumes.
• • Gateway will periodically take snapshots of the data as incremental backups and stores them on Amazon S3.