AWS Elastic File System storage capacity is elastic (grows /shrinks as needed) unlike EBS
NFS V4 protocol
30 cents/GB month
Multi AZ’s
Thousands of concurrent connections are supported
Read after write consistancy
Create a EFS
Provide AZ’s subnets, ips (optional)
the mount name and instructions to mount (Linux only. Windows is not supported currently as of 2018)
Permissions at folder/file level possible by IAM. Amazon EFS allows you to tightly control access to your file systems through POSIX permissions. Use Amazon VPC to manage network access.
EBS can be mounted to single EC2 instance where as EFS can be mounted by multiple EC2 instances
You can also mount Amazon EFS file systems on your on-premises datacenter servers via the NFSv4 protocol when connected to your Amazon VPC with AWS Direct Connect.
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