Instance stores

Question 1

Storage for the root device

Answer 1

Instance store (Ephemeral storage)
EBS Backed Volumes

Question 2

EBS Volumes

Answer 2

Root device fo ran instance launched from AMI is an Amazon EBS VOLUME created from an amazon EBS snapshot

Question 3

Instance store volumes

Answer 3

Root device for an instance launched from AMI is an instance store VOLUME created from an amazon S3.

Question 4

Can you launch additional instance store volumes after launch

Answer 4

No.. addiitonal instacne store volumes can added only during launch

Question 5

Valid status for instance store backed instances

Answer 5

Reboot & Terminate.

Question 6

what happens instance store volumes are stopped

Answer 6

You will loose underlying instance store volumes

Question 7

Rebooting impact on both the instances

Answer 7

Rebooting will not loose the data in bothe EBS/instance store backed instances.

Question 8

Termination imapct

Answer 8

By default both the root devices (ebs/instance store) will be terminated on deletion .. however with EBBS you can tell to keep the root device volume.