Storage

Question 1

S3 - Acronym

Answer 1

Simple Storage Service

Question 2

S3 - Definition

Answer 2

Amazon 83 has a simple web services interface that you can use to store and retrieve any
amount of data, at any time, from anywhere on the web. It gives any user access to the
same highly scalable, reliable, fast, inexpensive data storage infrastructure that Amazon uses
to run its own global network of web sites. The service aims to maximize benefits of scale and
to pass those benefits on to users

Question 3

S3 Basics - Components / Structure

Answer 3

(1) S3 = Simple Storage Service
(2) It is AWS’s primary storage service.
(3) You can store any type of file in S3.

Question 4

S3 Buckets

Answer 4

Buckets:

(1) Root level “Folders” you create in S3 are referred to as buckets.
(2) Any “subfolder” you create in a bucket is referred to as a folder.

Question 5

S3 Objects

Answer 5

Objects:

(1) Files stored in a bucket are referred to as objects.

Question 6

S3 Regions

Answer 6

(1) When you create a bucket, you must select a specific region for it to exist. This means that
any data you upload to the S3 bucket will be physically located in a data center in that
region.
(2) Best practice is to select the region that is physically closest to you, to reduce transfer
latency.
(3) If you are serving files to a customer based in a certain area of the world, create the
bucket in a region closest to your customers (to reduce latency for your customers).
NOTE: Some AWS services only work with/communicate
with each other if they are in the same AWS region.

Question 7

How are you charged for S3?

Answer 7

(1) Storage Cost:
- App|ies to data at rest in SS
- Charged per GB used
- Price per GB varies based on region and storage class
(2) Request Pricing - moving data in/out of S3:
- PUT
- COPY
- POST
- LIST
- GET
- Lifecycle Transitions Request
- Data Retrieval
- Data Archive
- Data Restore

Question 8

What are S3 permissions?

Answer 8

S3 permissions are what allow you to have granular control over who can View. access and
use specific buckets and objects.

Question 9

S3 - What levels can permission functionality be found?

Answer 9

Bucket and Object Level.

Question 10

S3 - What can you control at the bucket level?

Answer 10

On the bucket level you can control (for each bucket individually):

* List: Who can see the bucket name.
* UploadlDelete: Objects to (upload) or in the bucket (delete).
* View Permissions
* Edit Permissions: Add/edit/delete permissions

NOTE: Bucket level permission are generally used for “internal” access control

Question 11

S3 - What can you control at the object level?

Answer 11

On the Object level, you can control: (for each object individually)

* OpenlDownload
* View Permissions
* Edit Permissions

NOTE: You can share specific objects (via a link) with the anyone in the world.

Question 12

What is an object LifeCycle?

Answer 12

An object lifecycle is 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 13

S3 Storage Class - Standard

Answer 13

(1) Designed for general. all-purpose storage.
(2) Is the default storage option.
(3) 9999999999996 object durability (“eleven nines”).
(4) 99.9996 object availability.
(5) Is the most expensive storage class.

Question 14

S3 Storage Class - Reduced Redundancy Storage (RSS)

Answer 14

(1) Designed for non-critical, reproducible objects.
(2) 99.9996 object durability.
(3) 99.9996 object availability.
(4) Is less expensive than the standard storage class.

Question 15

S3 Storage Class - Infrequent

Answer 15

(1) Designed for objects that you do not access frequently but must be immediately available
when accessed.
(3) 9999999999996 object durability.
(4) 99.9096 object availability.
(5) Is less expensive than the standard/RRS storage classes.

Question 16

S3 Storage Class - Glacier

Answer 16

(1) Designed for long-term archival storage.
(2) May take several hours for objects stored in Glacier to be retrieved.
(3) 9999999999996 object durability
(4) Is the cheapest S3 storage class (very low cost)

Question 17

S3 Versioning - Core Attributes

Answer 17

(1) Versioning is either ON or OFF.
(2) Once it is turned ON, you can only “suspend” versioning. It cannot be fully turned OFF.
(3) Suspending versioning only prevents versioning going toward. All previous objects with
versions will still maintain their older versions.
(4) Versioning can only be set on the bucket level and applies to ALL objects in the bucket.

Question 18

AWS Import / Export

Answer 18

1. Ability to take on-premise data and physically snail mail it to AWS (Using a device that you own).
2. AWS will import the data to S3, EBS, or Glacier within one business day of receipt.

Question 19

AWS Import / Export Benefits

Answer 19

1. Off-Site backup policy.
2. Quickly migrate Large amounts of data to the cloud (up to 16 TB per job).
3. Disaster Recovery.

Question 20

Snowball

Answer 20

1. AWS provided appliance.
2. Is a petabyte-scale data transport solution.
3. Quickly move large amounts of data into and out of the cloud.

Question 21

Storage Gateway

Answer 21

Connects local data center software applications to cloud based storage (i.e. S3).

Question 22

Gateway-Cached Volumes

Answer 22

1. Storage volumes mounted to iSCSI devices on-premise servers.
2. The gateway will store the data written to this volume in Amazon S3 and will cache frequently access data on-premises.

Question 23

Gateway-Stored Volumes

Answer 23

1. Store all the data locatlly (on-premise).

2. Gateway will periodically take snapshots of the data as incremental backups and stores them on S3.

Question 24

Multipart Upload

Answer 24

1. upload a single object as a set of parts.
2. uploads parts concurrently.
3. can stop/resume file uploads.
4. if a part fails can retransmit the impacted part without transferring all data.
5. S3 assembles the parts after upload completes.
6. Required for objects 5GB and larger (recommended for 100 MB and larger).
7. Can be used to upload a file up to 5TB in size.

Question 25

Single Operation Upload

Answer 25

1. Traditional upload where the file is uploaded in one part.
2. Up to 5GB in size, use multipart for any file over 100 MB.

Question 26

Lifecycle Policies

Answer 26

Set of rules that automate the migration of an object’s storage class to different storage class (or deletion), based on specific time intervals (file usage / access).

Question 27

Amazon Glacier

Answer 27

1. Archival storage, not accessed frequently.
2. Check in/out can take several hours.
3. Integrates with S3 Lifecycle policies.
4. Very inexpensive
5. Should NOT be used as a backup solution.

Question 28

Amazon Glacier Retrieval timelines

Answer 28

1. Expedited - 1-5 minutes.
2. Standard - 3-5 Hours
3. Bulk - 5-12 Hours.