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Instance Store Volumes

• Local on EC2 Host
• Physically connected to one EC2 Host
• Block Storage Devices
• instances on that host can access them
• Highest storage performance in AWS
• Included in instance price
• Attached at Launch
• you pay for this anyway, it’s already included in instance price

Say instane-1 is on EC2 host A and it migrated to EC2 host B, any data it had on Instance Store, it will lose all of them upon migration.
And instance-1 will be attached with new Instace Store Volumes.

Instance Store Volumes – type

D3 = 4.6 GB/s throughput, much higher throughput than EBS-HDD’s.
I3 = 16 GB/s of sequential throughput
MORE IOPS and Throughput vs EBS

Instance Store vs EBS

• need persistence? use EBS
• need reslience? use EBS
• Storage needs to be isolated from instance lifecycle? use EBS
• If you need high performance … then it depends because EBS also has some with high performace but Instance Store is generally faster