Instance Metadata /EFS

Question 1

userdata

Answer 1

169.254.169.254/latest/user-data returns boot strap script

Question 2

metadata

Answer 2

169.254.169.254/latest/meta-data returns data about instance

Question 3

EFS

Answer 3

Elastic File System - File storage service that can be associated with multiple ec2 instances which performs concurrent operations

Supports Network file system version 4 (NFSV4) protocol

no provisioning required like EBS .. only pay for the storage you sue

can scale up to petabytes

supports concurrent NFS connections

Data is stored across multiple AZ’s within a regions

Read after write consistency,