AWS Instance Store -
- Hardware storage directly attached to EC2 instance amd cannot be detached and attached to another instance
- Highest IOPS for any available storage
- Ephemiral Storage (Loses data when instance is terminated, stopped or hibernated)
- Good to buffer/cache/scratch data/temporary content
- AMI created from an instance does not its instance store volume preserved
- You can specify the instance store volumes to an instance when you launch the 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 and write in a stripes 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 in multiple volumes
- For critical applications
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