Mounting specific filesets

By using the Lustre fileset feature, you can mount only a subset of the file system namespace, which is called a fileset. To mount a fileset of the file system, on the client you specify the subdirectory path after the file system name. A fileset mount (also called a subdirectory mount) limits the file system namespace visibility on a specific client.

Example – Mount a Lustre fileset

1. Assume you have an FSx for Lustre file system with the following directories:

   team1/dataset1/
   team2/dataset2/

2. You mount only the team1/dataset1 fileset, making only this part of the file system visible locally on the client. Use the following command and replace the following items:

   • Replace file_system_dns_name with the actual file system's DNS name.

   • Replace mountname with the file system's mount name. This mount name is returned in the CreateFileSystem API operation response. It's also returned in the response of the describe-file-systems AWS CLI command, and the DescribeFileSystems API operation.

   mount -t lustre file_system_dns_name@tcp:/mountname/team1/dataset1 /fsx

When using the Lustre fileset feature, keep the following in mind:

• There are no constraints preventing a client from remounting the file system using a different fileset, or no fileset at all.

• When using a fileset, some Lustre administrative commands requiring access to the .lustre/ directory may not work, such as the lfs fid2path command.

• If you plan to mount several subdirectories from the same file system on the same host, be aware that this consumes more resources than a single mount point, and it could be more efficient to mount the file system root directory only once instead.

For more information on the Lustre fileset feature, see the Lustre Operations Manual on the Lustre documentation website.