AWS Classroomnotes 12/Nov/2022

Life cycle management for snapshots

• To automate the snapshot creation/ami creation we can use Data Lifecycle manager
  
• To create a Data lifecylce policy
  
  
  
  
  
  
  
• To remove the policy first disable and then delete the policy.

EBS Volume Types

• Refer Here for official docs.
• Disks are broadly categorized based on disk type
  • SSD:
    • Performance is measure in IOPS (Input/Output per second) equivalenent to read write speed of 256 KiB/s
    • Refer Here for IOPS
    • General purpose 2:
      • IOPS is relative to size of the disk
      • Min IOPS is 100
      • Max IOPS for a disk less than or equal to 1000 GiB is 3000 IOPS. Till this size the baseline is 3 IOPS per GiB
      • If the size of disk is above 1000 till 5333 the IOPS is size * 3.
      • After 5334 the max IOPS is 16000
    • GP3:
      • New Generation general purpose disk
      • This offers better speeds at almost the same cost as gp2.
      • In GP3 the IOPS can be set
    • Provisioned IOPS
  • HDD: IOPS in HDD is equivalent to read/write 1,024 KiB per second.
    • This is used to store larger data volumes with less frequent access or speed is not the primary measurement for us.
    • Minimum size is 125 GiB & Max 16384 GiB
• Burstable Gp2 performance Refer Here

Questions

• Is it possible to change the disk type from gp2 to gp3 for an attached volume.
• Is it possible to reduce the size of the disk.