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    1. Stop all activities on the current farm
    2. Export data from MySQL to csv files on disk
    3. Upgrade the supervisor
    4. Import data into PostgreSQL from the csv files
    5. Enable activities on the new supervisor

    The order of these steps are crucial! Note that there are steps to be taken before upgrading the supervisor.

    titlePython on Windows

    Python 2.x (2.6 or above) is now a prerequisite for supervisor installation. It comes standard on Linux and Mac, but you will have to install it on Windows in advance. Also make sure that python is added to the System PATH. It's an opt-in feature for the MSI installer.



    Code Block
    qbadmin supervisor --set stop_activity
    qbadmin supervisor --set reject_submit

    You will also want stop workers from picking up new work. If you want to allow workers to finish up their current frames, do:



    Code Block
    qblock --all --purge

    Then wait for all activities to stop.

    Step Two:  Export Data from MySQL to to .csv (Comma-separated values) files


    1. Make sure that the MySQL server is running, and that you can connect to it using the mysql client, and that your qube table version is at 37.

      1. If you haven't changed the database administrator user and password, you should be able to do the following on a command prompt to confirm that the MySQL server is running:

        Code Block
        Linux: /usr/bin/mysql -u root -e 'SELECT * FROM qube.tableversion' 
        Mac: /usr/local/mysql/bin/mysql -u root -e 'SELECT * FROM qube.tableversion' 
        Windows: "C:\Program Files\pfx\qube\mysql\bin\mysql" -u root -e "SELECT * FROM qube.tableversion" 
      2. Make sure that the above command works and returns:

        Code Block
        | version |
        | 37      |
    2. If you get something less than 37 returned by the above command, it means that your current Qube supervisor version is older than 6.10-0, and that you need to update your MySQL database tables first, before you can upgrade the database schema. To do so:

      1. Download the "upgrade_supervisor" program suitable for your supervisor platform from

      2. On a command prompt, run the upgrade_supervisor program that program that you just downloaded. 

      3. Check that there weren't any critical errors reported by by upgrade_supervisor
      4. Check that the version is now indeed updated to 37, by running the mysql -u root -e 'SELECT * FROM qube.tableversion' command command again
    3. Choose a destination folder on your supervisor for the MySQL csv files.   Make sure that your user and the mysql server process both have write permission to this folder and all its parent folders, and that the volume is sufficiently large. Also note that a faster disk, such as an SSD, will help speed up the export/import process. 

      titleOn CentOS 7.x and possibly other Linux distros, create a working directory under /opt and do the export while running as the root user

      Do NOT use /tmp, /var/tmp (/usr/tmp), or any subdirectories under them. These OSs give the MySQL service its own private /tmp and /var/tmp folders, which prevents the mysqldump command from running correctly. Creating a subdirectory under /root does not work either, nor will a subdirectory in any user's home directory, since non-root users home directories are usually mode 700, so the MariaDB server can't access it.

      One approach that doeswork is creating a directory under /opt and opening up the permissions:

      No Format
      sudo mkdir -p /opt/mysql_dump 
      sudo chmod 755 /opt/mysql_dump

      Then, install the script from the next step into this directory as the root user, and run the export script as root.

    4. Download the script script from and copy it into the destination folder.
    5. On a command prompt, go to the destination folder, and run Running it without any argument will create a subfolder in the current directory named "qube_mysqldump" and dump all files into it.

      Code Block
      1. You may override the dump subfolder and DB username, password, and mysql install location. Run " -h" to see the list of options.

    6. Sit back. This process can take a long time to complete, depending on how many jobs you have on the system. 

    7. Once the process completes, make sure there were no errors reported on the terminal. Also have a look a the dump directory to confirm that there is a subfolder "qube" and a bunch of subfolders like "<number>qube" .

    8. Take a note of the dump directory location, and proceed to the next step, "Upgrade the Supervisor".

    Proceed with the upgrade of the supervisor software.  Using the QubeInstaller is recommended, but you can also run the individual installer packages (RPMs, DEBs, MSIs, or PKGs), should you choose.

    Step Three: Upgrade the Supervisor

    See See .Upgrading Qube! v7.0-0 for for details, but come back here after upgrading the supervisor software.


    Step Four: Import Data into PostgreSQL from the .csv files


    Do this before making any change to your farm, or submitting new jobs.

    titleEstimated time for data import

    We have found that the import takes roughly 1/4 of the time for the export. Importing 10,000 jobs with 100 frames on average on a Mac system with an SSD took about 33 seconds.

    Importing the previously exported data

    Once you upgrade the supervisor, you are ready to import data into the new PostgreSQL server. 

    1. Make sure that PostgreSQL server is running, and accepting connections:

      Code Block
      Linux: /usr/local/pfx/pgsql/bin/psql -p 50055 -d pfx -U qube -c "SELECT * FROM qube.tableversion"
      Mac: /Applications/pfx/pgsql/bin/psql -p 50055 -d pfx -U qube -c "SELECT * FROM qube.tableversion"
      Windows: "C:\Program Files\pfx\pgsql\bin\psql" -p 50055 -d pfx -U qube -c "SELECT * FROM qube.tableversion"

      Note that this should return:

      Code Block
      (1 row)
    2. On a command prompt,   go to the folder where you ran the export script earlier. This should be the parent folder of the "qube_mysqldump" folder, by default.
    3. Run the the script script to import data from the csv files that were generated earlier.

      Code Block
      Linux: python /usr/local/pfx/qube/utils/pgsql/
      Mac: python /Applications/pfx/qube/utils/pgsql/
      Windows: python "C:\Program Files\pfx\qube\utils\pgsql\
    4. Sit back. This process will also take some time to complete, although it should be significantly faster than the export.
    5. Make sure there weren't any errors reported on the terminal.

    Step Five: Enable Activities on the New Supervisor

    Run the following commands to enable the new supervisor to accept new jobs and start dispatching jobs to workers

    Code Block
    qbadmin supervisor --unset stop_activity
    qbadmin supervisor --unset reject_submit

    You'll also need to unlock the workers you want to start using again. If you'd like to unlock all workers, then do:

    Code Block
    qbunlock --all


    Congratulations, you are done. Enjoy the new ride!