EC2 - EC2 101 Part 2

Question 1

What is EBS?

Answer 1

EBS allows you to create storage volumes and attach them to EC2 instances.

Question 2

Once a volume is attached…

Answer 2

…you can create a file system on top of these volumes, run a database, or use them in any other way you would use a block device

Question 3

EBS volumes are placed…

Answer 3

…in a specific AZ, where they are automatically replicated to protect you from the failure of a single component

Question 4

single component?

Answer 4

storage array

Question 5

EBS volume types

Answer 5

General Purpose SSD (GP2)
Provisioned IOPS SSD (IO1)
Throughput Optimized HDD (ST1)
Cold HDD (SC1)
Magnetic (Standard)

Question 6

General Purpose SSD (GP2)

Answer 6

General purpose, balances both price and performance

Ratio of 3 IOPS per GB with up to 10K IOPS and the ability to burst up to 3000 IOPS for extended periods of time for volumes under 1 Gib

Question 7

Provisioned IOPS SSD (IO1)

Answer 7

Designed for I/O intensive apps such as large relational or NoSQL databases

Use if you need more than 10K IOPS

Can provision up to 20K IOPS per volume

Highest-performance SSD volume designed for mission-critical applications

Question 8

Throughput Optimized HDD (ST1)

Answer 8

Big data
Data warehousing
Log processing
Sequential data
Cannot be a boot volume

Question 9

Cold HDD (SC1)

Answer 9

Lowest cost storage for infrequently accessed workloads
File Server
Cannot be boot volumes

Question 10

Magnetic (Standard)

Answer 10

Lowest cost per GB of all EBS volumes types that is bootable.
Ideal for workloads where data is accessed infrequently, and apps where the lowest storage cost is important

Question 11

Can you mount 1 EBS volume to multiple EC2 instances?

Answer 11

No, use EFS instead

Question 12

General Purpose SSD (GP2) Use Cases

Answer 12

• Recommended for most workloads
• System boot volumes
• Virtual desktops
• Low-latency interactive apps
• Development and test environments

Question 13

Provisioned IOPS SSD (IO1) Use Cases

Answer 13

-Critical business applications that require sustained IOPS performance, or more than 10,000 IOPS or 160 MiB/s of throughput per volume
-Large database workloads, such as:
MongoDB
Cassandra
Microsoft SQL Server
MySQL
PostgreSQL
Oracle

Question 14

Throughput Optimized HDD (ST1) Use Cases

Answer 14

• Streaming workloads requiring consistent, fast throughput at a low price
• Big data
• Data warehouses
• Log processing
• Cannot be a boot volume

Question 15

Cold HDD (SC1) Use Cases

Answer 15

• Throughput-oriented storage for large volumes of data that is infrequently accessed
• Scenarios where the lowest storage cost is important
• Cannot be a boot volume