Block Storage in AWS
- Overview
- When we create an ec2 instance with some os in the AWS, ec2 instance is created from some physical server (host) in the AZ which would be used to allocate cpu and RAM to the EC2 instance (Virtual Machine)
- Every EC2 needs needs a storage volume (disk). If the disk is created from the same physical server as the EC2 instance host i.e. referred as instance storage and if the disk is created from the different physical server that EC2 instance host i.e. referred as Elastic Block Storage
- When we create an EC2 instance we would need one disk for sure which has OS (os disk) in it and additional disks (data disks) can be used for other storage purposes.
- In AWS the basic ground rule is all the disks with OS have to be EBS Storage Volumes.
- All the EC2 instances donot support instance storage there are only few instance types which support instance storage.
- Now lets create an ec2 instance Refer Here
- Exploring Storage options in the instance types section
- EC2 instance with EBS Option only
- Now let try to Select the instance type with instance storage enabled
- I will be creating an ec2 instance with size t2.micro (without instance storage) and only root volume (os disk). Lets explore storage options
- Volume is a virtual disk.
- Snapshot is backup of a volume.
