Speed of the Volume

• Disk Types:
  • SSD
  • HDD
  • Magnetic
• Disk Speed (SSD): is measure in IOPS. Speed to Read or write

1 IOPS = 256 KiB/s
1000 => 1000 * 256 Kib/s

• As IOPS increase price also increases
• Volume Types:
  • General Purpose (SSD):
    • For normal IO Operations
    • IOPS is determined by size
  • Provisioned IOPS (SSD):
    • User can specify IOPS.
    • IOPS to Disk ratio should be 50: 1 GiB
  • Cold HDD
  • Throughput Optimized HDD
  • Magnetic
• Experiment Volume types restriction in Create Volume Page
• Choosing Disks
  • Looking for more storage (size) at less cost with normal speeds choose HDD
  • Looking for speed always SSD but will cost more
  • High speed databases => SSD
  • WebServer => Genaral Purpose SSD (i might not require lot of size)
• EBS/Instance Store can be attached to one machine at a time

Network Storage Devices for AWS

• In AWS when we need network storage, AWS provides Elastic File Storage

• Elastic File Storage can be create in multiple AZ’s and can be mounted by multiple machines at one time (unlike EBS)

• EFS mounts cannot be OS/root disk

• EFS can be mounted directly on Linux instances, For windows use FsX

• Experiment: Create a EFS volume and mount it two ec2 instances following instructuion

  • Ensure the security group will allow access
  • EFS storage also uses Security group for restrictions. Ensure you are adding necessary rules to exclude the machines which you are mounting

• It is possible to host Third party Network storages in AWS from AWS Market place