EBS - Elastic Block Storage Flashcards
What is an EBS?
An EBS (Elastic Block Store) Volume is a network drive you can attach to your instances while they run. It allows your instances to persist data
Are EBS volumes reusable?
Yes, you can detach it and attach it to another instance
How does an EBS communicate to the instance?
using the network, which means there might be a bit of latency
Are EBS multi AZ?
no
How can I move an EBS volume across AZs?
creating a snapshot of it
What are the EBS provisioned capacity elements?
size in GBs and IOPS
How you get billed for an EBS?
for the provisioned capacity
Can you increase an EBS capacity?
yes, over time
What are the EBS Volume Types?
- GP2
- IO1
- ST1
- SC1
Which are SSD EBS Volume types?
GP2 and IO1
What is the definition for EBS GP2?
General Purpose SSD: volume that balances price and performance for a wide variety of workloads
What is the definition for EBS IO1?
Provisioned IOPS: Highest-performance SSD volume for mission-critical low-latency or high-throughput workloads
What is the definition for EBS ST1?
Throughput Optimized: Low cost HDD volume designed for frequently accessed, throughput-intensive workloads
What is the definition for EBS SC1?
Cold HDD, Infrequently accessed data: Lowest cost HDD volume designed for less frequently accessed workloads
What EBS volumes can be used as boot volumes?
GP2 and IO1
When you shoud not run EBS Snapshots?
while your application is handling a lot of traffic because they use IO
Where are EBS snapshots stored?
In S3, but you won’t’ directly see them
It is necessary to detach EBS volume to create snapshot?
No, but recommended
What is backed up on EBS Snapshots?
only changed blocks, it is incremental
What can you use to automate EBS snapshots?
Amazon Data Lifecycle Manager
What to expect when you create an encrypted EBS volume?
Everything will be encrypted:
- all data
- snapshots and volumes created from snapshots
What leverages EBS encryption?
keys from KMS (AES-256)
How to encrypt an EBS volume?
1-create snapshot
2-encrypt the snapshot
3-create volume
4-attach it to the instance
What is an Instance Store?
a temporary ephemeral storage type located on disks that are physically attached to a host machine
