Some operations, like backup, restore, and data loading, require either reading or writing very large files. You can mount a network attached storage (NAS) file system to support these operations. Your NAS storage can be in the drive format you choose.

About NAS mount

ThoughtSpot enables you to mount a NAS file system for storing or accessing large files. The file system mounts at the same location on each node in the cluster automatically. When any node restarts, the file system mounts again automatically, if it can be found.

When supplying a directory for writing or reading a backup, you can specify a new mount point within /export as the directory to use. Likewise, you can stage data there for loading. It is best to have 2 separate NAS volumes, individually dedicated to data loads and backups.

Backups are written by the Linux user admin. If that user does not have permission to write to the NAS file system, you can write the backups to a disk (for example /export/sdc1, /export/sdd1, /export/sde1, or /export/sdf1) and then set up a cron job that executes as root user and copies the backup to the NAS device every night, then deletes it from the directory.

Do not send the periodic backups or stage files on /export/sdb1 since it is a name node. It is used internally by Hadoop Distributed File System (HDFS) and if this drive fills up, it can cause serious problems. Do not allow backups or data files to accumulate on ThoughtSpot. If disk space becomes limited, the system will not function normally.

You can mount NAS through the Administration Portal, or using tscli.

Mount NAS using the Administration Portal

To mount a NAS file system using the Administration Portal, navigate to the Administration Portal by clicking on the Admin tab from the top navigation bar. Select NAS Configuration from the side navigation bar that appears.

Admin Portal - NAS

  1. Select Add Mount Point.

  2. Specify the parameters in the dialog box that appears:

    Add mount point

    1 Choose the mount type: either NFS (Network File System) or CIFS (Common Internet File System).
    2 Specify the server address, in the form
    3 Specify the server path.
    4 Specify the local mount point. This should be within the /export directory.
    5 If you choose the CIFS mount type, you must specify a username and password.
    6 If you choose the CIFS mount type, you must specify a username and password.
    7 Optionally specify additional command-line subcommands and flags. Refer to the tscli reference for NAS commands.
  3. Click OK.

You can unmount NAS from the Administration Portal, or by running tscli nas unmount --dir <directory>.

Mount NAS using tscli

To mount a NAS file system using the tscli, follow these steps:

  1. Log in to the Linux shell using SSH.
  2. Mount the directory to the file system by issuing the appropriate command:
    • Example for an NFS (Network File System) directory:

      tscli nas mount-nfs --server
         --path_on_server <path>  /tsdev-backup --mount_point /export/BACKUPS/
         --options vers=<version>,sec=<security scheme>,<OPTIONS>
    • Example for a CIFS (Common Internet File System) directory:

      tscli nas mount-cifs --server
        --path_on_server /tsdev-backup --mount_point /export/BACKUPS/
        --username 'avtprdweutspotdev' --uid 1001 --gid 1001 --options 'vers=3.0'
  3. Use the mounted file system by referring to its mount point.

  4. When you are finished with it, you can optionally unmount the NAS file system:

     tscli nas unmount --dir <directory>