• EFS is an implementation of NFSv4
    • EFS file systems are created and mounted in Linux.
    • EFS storage exists separately from an EC2 instance like EBS does.
      • EBS is block storage
      • EFS is file storage
    • EFS is a private service.
      • Isolated to the VPC its provisioned into.
      • Access is via mount targets inside the VPC.
    • EFS access outside of the VPC with
      • VPC peering
      • VPN connections
      • AWS direct connect

    Elastic File System Explained

    EFS Exam PowerUp

    • EFS is Linux Only
    • Two t-put modes:
      • Bursting works like GP2 volumes inside EBS with a burst pool. The more data you store in the FS, the better performance you get.
      • Provisioned t-put modes can specify t-put requirements separately from size.
    • Two storage classes available:
      • Standard
      • Can use lifecycle policies to move data between classes.