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AWS Solutions Architect Associate (SAA-C02)
Elastic Compute Cloud (EC2)

Instance Store

  • Hardware storage directly attached to EC2 instance (cannot be detached and attached to another instance)
  • Highest IOPS of any available storage (millions of IOPS)
  • Ephemeral storage (loses data when the instance is stopped, hibernated or terminated)
  • Good for buffer / cache / scratch data / temporary content
  • AMI created from an instance does not have its instance store volume preserved

You can specify the instance store volumes only when you launch an instance. You can’t attach instance store volumes to an instance after you’ve launched it.

RAID

  • RAID 0
    • Improve performance of a storage volume by distributing reads & writes in a stripe across attached volumes
    • If you add a storage volume, you get the straight addition of throughput and IOPS
    • For high performance applications
  • RAID 1
    • Improve data availability by mirroring data in multiple volumes
    • For critical applications

Last updated: 2022-05-18