Network File Systems

Question 1

What is EFS?

Answer 1

o Amazon EFS (Elastic File System) is an implementation of the Network File System (NFSv4), delivered as a service, and currently only supported on Linux
o File systems can be created and mounted on multiple Linux instances at the same time (as opposed to EBS volumes, that can only be attached to a single instance at a time)
o EFS are tied to specific VPCs
o EFS mount targets can only live in one AZ at a time, and they sit inside a subnet
o 2 throughput mode:
 Bursting throughput: 100MiB/s base burst, 100MiB/s per 1 TiB size. Earning 50MiB/s per TiB of storage
 Provisioned throughput: allows control over throughput independently of file system size
o EFS supports 2 storage classes (Standard and Infrequent Access)