Technology - Storage Services

Question 1

S3

Answer 1

Simple Storage Service is a highly available object storage service offering high scalability, data availability, security, and performance.

Objects refer to files that are stored in buckets or directories. Essentially unlimited storage can hold millions of private or public objects per bucket.

Question 2

S3 Features

Answer 2

1. Security can be set at a bucket or object level.
2. S3 access logs help to track access.
3. Versioning available.
4. A regional service but names must be unique globally.
5. Highly durable (11 9’s) and available (4 9’s) data.

Question 3

S3 Storage Class: S3 Standard

Answer 3

Recommended for: frequently accessed data

• data stored across multiple AZs
• low latency and high throughput

Question 4

S3 Storage Class: S3 Intelligent-Tiering

Answer 4

Recommended for: data with unknown or changing patterns

• data stored across multiple AZs
• automatically moves data to the most cost-effective storage class

Question 5

S3 Storage Class: S3 Standard - Infrequent Access (IA)

Answer 5

Recommended for: long-lived data that is infrequently accessed

• data stored across multiple AZs
• data accessed less frequently but requires rapid access

Question 6

S3 Storage Class: S3 One Zone - Infrequent Access (IA)

Answer 6

Recommended for: re-creatable data with infrequent access

• like Standard-IA but data stored in a SINLGE AZ

Question 7

S3 Storage Class: S3 Glacier

Answer 7

Recommended for: long-term backups

• data stored across multiple AZs
• long-term data storage and archival with retrieval being 1-5min, 3-5h or 5-12h

Question 8

S3 Storage Class: S3 Glacier Deep Archive

Answer 8

Recommended for: long-term data archival (reg compliance)

• data stored across multiple AZs
• like Glacier but longer access times: 12h or 48h

Question 9

S3 Storage Class: S3 Outpost

Answer 9

Recommended for: data that needs to be kept local

• data stored on premises
• data stored across multiple devices and servers

Question 10

S3 Use Cases

Answer 10

1. Static websites
2. Data archive
3. Analytics systems
4. Mobile applications

Question 11

EC2 Storage

Answer 11

Storage options available for EC2 instances. EC2 can use Elastic Block Store (EBS) volumes, instance storage volumes and Elastic File System (EFS).

EBS = persistent block-level storage; you can detach it and attach to others
Instance Store = temporary block-level storage; that data is terminated along with the instance
EFS = scalable file storage, like hard-drives installed on your instance and can be moved

Question 12

EBS

Answer 12

Elastic Block Store - a storage device called a volume, that can be attached to (or removed from) your instance. Data will persist even when the EC2 is stopped.

Can only be attached to one instance and to one AZ.

Recommended for: quickly accessible data, running database on an instance, long-term storage.

Question 13

Instance Store

Answer 13

A local storage that is physically attached to the computer and cannot be removed.

Storage is temporary, gone with the EC2 instance stop. Faster speed and latency.

Recommended for: temporary storage, data that’s replicated across instances.

Question 14

EFS

Answer 14

Elastic File System. A serverless network file system for sharing files (like dropbox).

Can only be used by Linux. Accessible across the Region. More expensive than EBS.

Recommended for: main directories for business-critical apps, light and shift of existing enterprise apps

Question 15

Storage Gateway

Answer 15

A hybrid storage service. It’s used to connect on-prem and loud data.

Recommended for: moving backups to cloud, reducing cost for hybrid cloud storage and low latency access to data

Question 16

AWS Backup

Answer 16

Helps to manage data backups across multiple AWS services. Integrates with resources like EC2, EBS, EFS. You can decide the frequency of access and retention period.