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Ensure that the environment variables are set correctly:

Excerpt

Variable	Description
MZ_HOME	This environment variable specifies where the software is installed.
JAVA_HOME	This environment variable specifies where the JDK is installed.
PATH	This environment variable specifies the search path and must contain the following directories: `$JAVA_HOME/bin:$MZ_HOME/bin`

Info

title	Example - Setting Environment Variables

Code Block

language	text
theme	Eclipse

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

Note

title	Note!

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

Make a backup of all your configurations with System Export.
Code Block
language text
$ mzsh mzadmin/<password> systemexport <backup directory>/<filename>
Note
title Note!
These configurations must be imported after the upgrade.
For safety, make an online backup of the database(s). For information about how to perform an online backup, see Preventive Maintenance Procedures.

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

Info

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

Code Block

language	text
theme	Eclipse

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

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