EBS Volume

EBS (Elastic Block Store) Voltume is a network drive you cna attach to your instances while they run.

 

EBS(Elastic Block Store) Volume은 AWS(Amazon Web Services)에서 제공하는 블록 스토리지 서비스입니다. EC2 인스턴스에 사용할 수 있는 저장 장치로, 가상 디스크와 유사하게 동작합니다.

 

It allows Instance ti persist data, even after their termination

They can only be mounted to one instance at a time (at the CCP level)

( CCP - Certified Cloud Practitioner - one EBS can be only mounted to one EC2 instance )

 

They are bound to a specific availbility zone.

 

Analogy : they are like a network USB Stick !!!!!!

Free tier : 30 GB of EBS storage of type General Purpose (SSD) or magentic per month.

 

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Its a Network Drive ( not a physical drive )

• - use network to communicate the EC2 , which means there might be a bit go latency
• - can be detached from an EC2 , and attached to another one quickly (기존 ec2 에 제거 후 다른 ec2 에 부착이 가능)

Locked to an Availablity Zone ( AZ )

- EBS Volume in us-east-1a  -> us-east-1b ( X )  // not  possible !

- to move a volume across, yopu first need to snapshot it.

 

Has a provisioned capacity (size in GBs, and IOPS)

- You get billed for all the provisioned capacity

- You can increase the capacity of the drive over time

 

 

EBS - Delete on Termination attribute.

 

Default :

  Root Volum - on (attribute enabled)

  new created Volume - off

 

It controls the EBS behavour when EC2 terminates.

 

Can be controlled by the AWS console / CLI

 

Use case : preserve root volume when instance is terminated.