EBS Flashcards
What is EBS?
Elastic Block Storage.
These are virtual disks/volumes that are placed in a specific to an availability zone but are replicated to protect from single points of failure.
What can you do with them?
1) Create storage volumes & attach to EC2 instances.
2) You can create file systems on top of them.
3) Run a database or anything you want on block storage.
4) You can install applications on them.
What is the EBS root volume?
The volume which the operating system is installed on them. Root (Linux) or C Drive (Windows).
Volume Types?
- General Purpose (SSD) GP2.
- Provisioned IOPS (SSD) IO1.
- Throughput Optimised HDD (ST1)
- Cold HDD (SC1)
- Magentic (Standard)
Characteristics of General Purpose SSD ?
1) General purpose.
2) A balance of price and performance.
3) Ratio of 3 IOPS per GB with up to 10,000 IOPS.
4) Burst up to 3,000 IOPS (for extended periods of time)
Characteristics of Provisioned IOPS SSD?
1) For high-performance applications.
2) If you need more than 10,000 IOPS
3) Can provision up to 20,000 IOPS per volume.
Characteristics of Throughput optimised HDD (ST1)?
1) Big Data
2) Data warehouses
3) Log processing
4) cannot be a boot volume.
Characteristics of Cold HDD (SC1)?
1) Lowest costs storage
2) Designed for infrequently accessed workloads.
3) File Server
4) cannot be a boot volume
Characteristics of Magnetic (Standard)?
1) Lowest cost per gigabyte of all EBS volumes that is bootable.
2) Magnetic volumes are ideal for workloads where is accessed infrequently.
3) Applications where the lowest storage is important.
Can you migrate EBS volumes to different regions?
1) Take a snapshot
2) Create an AMI
3) Copy the AMI to the new region
4) Launch the instance in the new region, using the AMI.
How can you move an EBS volume from one AZ to another?
1) Create a snapshot.
2) Create an AMI from snapshot.
3) Launch a new instance from that AMI and select the new AZ.
