Trouble with data synchronization and writable per-user subdirectories using EFS

Question

I used [this EFS walkthrough](https://docs.aws.amazon.com/efs/latest/ug/accessing-fs-nfs-permissions-per-user-subdirs.html) to mount my EFS and enable writable per-user subdirectories on my EC2 instance.

According to the documentation, `All files and subdirectories the user creates in their home directory are then created on the Amazon EFS file system.` But when I look through the user directories in `/mnt`, they do not all contain the files and subdirectories that are in the corresponding user home directories.

How can I ensure that what's on the EFS is the same as what's in the users' home directory? Because if I unmount and remount the EFS, I will lose data...

Accepted Answer

For each user did you first create and mount a user-specific subdirectory in the shared EFS to the users home directory? Does each user have the file system mounted, which can be seen with `mount -t nfs4`? If the users home directory is mounted to the EFS file system, all files created since the file system was mounted should be visible. If the file system isn't mounted for a user, their view of their home directory and the similarly named sub folder on EFS will not match.

Trouble with data synchronization and writable per-user subdirectories using EFS

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