Storage

Enable Disk Quotas

NOTE: The following operations are performed on the head node or frontend. In this example, we'll enable quotas on /state.

1. Edit /etc/fstab, and add usrquota and grpquota to the mount. Example below (the important parts are the usrjquota, grpjquota, and jqfmt):

    UUID=5a3ec9d6-32b9-4ffd-9108-8bbf4e20cb46 /state ext4 defaults,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0 1 2
   

2. Remount the filesystem

    mount -o remount /state
   

3. Generate the quota files

    quotacheck -mcug /state
   

4. Update the quota files

    quotacheck -mavug
   

5. Activate quotas

    quotaon -a
   

Creating a new NFS Share

NOTE: The following operations are performed on the head node or frontend.

1. Create a folder in /export

    mkdir /export/groups
   

2. Add an entry to /etc/auto.share

    groups deohs-brain.brain.local:/export/&
   

3. Sync auto.share with compute nodes

    rocks sync users
   

4. Restart autofs on all compute nodes

    rocks run host "service autofs restart"
   

Creating a Group Folder

Each work group should be assigned a shared folder for storing common data and applications. For this example, we'll create a folder for the group "mesa".

1. Create the folder

    mkdir /export/groups/mesa
   

2. Set ownership to root, and the group

    chown root:mesa /export/groups/mesa
   

3. Set permissions to restrict access to the group. With the default behavior of new files, to have group ownership.

    chmod 2770 /export/groups/mesa
   

4. Finally, apply a POSIX ACL to set default permissions on files and directories.

    setfacl -d -m u::rwX,g::rwX,o::0 /export/groups/mesa