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The preparation steps will not affect the running system and can be done in advance.

  1. Ensure that the environment variables are set correctly:

    VariableDescription
    MZ_HOME
    This environment variable specifies where the software is installed.
    JAVA_HOMEThis environment variable specifies where the JDK is installed.
    PATHThis environment variable specifies the search path and must contain the following directories: $JAVA_HOME/bin:$MZ_HOME/bin

    Example - Setting Environment Variables

    export MZ_HOME=/opt/mz
export JAVA_HOME=/opt/jdk/jdk-17.0.2
export PATH=$JAVA_HOME/bin:$MZ_HOME/bin:$PATH

    Note!

    You must specify the Java version required for the version that you are upgrading from.

  2. Make a backup of all your configurations with System Export.

    $ mzsh mzadmin/<password> systemexport <backup directory>/<filename>

    Note!

    These configurations must be imported after the upgrade.

  3. For safety, make an online backup of the database(s). For information about how to perform an online backup, see Backup and Disaster Recovery Procedures.
     

  4. If you are performing an upgrade of a system with large configurations, you may need to increase the maximum number of file descriptors.

    Example - Changing the Maximum Number of File Descriptors on Linux.

    $ cat /proc/sys/fs/file-max 
 5000 
 $ su - root 
 Password: 
 $sysctl -w fs.filemax=10000
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