A virtual hard drive in the cloud

Highly available and durable solution for attaching persistent block storage to an Elastic Cloud Computing — EC2 instance.

• IOPS — Input/Output Per Second

  It is the speed at which non-contiguous reads and writes can be performed on a storage medium

• Throughput

  The data transfer rate to and from the storage medium in megabytes per second

• Bandwidth

  the measurement of the total possible speed of data movement along the network

<aside> 💡 EBS Volumes can be modified on the fly, such as changing the storage type or volume size.

</aside>

Types

1. General Purpose SSD — gp2
   • General usage without specific requirements
2. Provisioned IOPS SSD — io1
   • Fast input & output
3. Throughput Optimized HDD — st1
   • Low cost frequently accessed
   • Datawarehouse's, when you have a lot of data
4. Cold HDD — sc1
   • Lowest costing HDD
   • Backup
5. EBS Magnetic — standard
   • Archival Storage

Storage Volumes

• HDD
  • Good for large files
  • Bad for large amount of small files
  • Better for throughput
• SSD
  • Very good for frequently read and writes
  • Quicker access
  • High I/O
• Magnetic Tape
  • Highly Durable, lasts for decades
  • Cheap to produce

Moving Volumes

• AZ
  1. Create a Snapshot
  2. Create an AMI
  3. Launch new EC2 instance
• Region
  1. Take a Snapshot
  2. Create an AMI
  3. Copt the AMI to another Region
  4. Launch EC2 instance

Encrypted Root Volume