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Amazon EFS – Mount Targets
- An Amazon EFS mount target provides an entry point into an EFS file system from a specific VPC subnet.
- Each mount target has its own private IP address and is associated with a security group.
- To access an EFS file system from an EC2 instance, the instance’s subnet must be able to reach a mount target in the same Availability Zone.
- Best practice: Create one mount target per AZ where your EC2 instances run, to ensure high availability and low latency.
- EFS automatically handles multi-AZ replication; the mount target just provides the network path for NFS traffic.
- Instances connect using the DNS name of the file system, which resolves to the IP address of the mount target in the same AZ.