If you want to migrate to WebSphere® MQ Version 6.0 and
are already using the RedHat Enterprise Linux® 3.0 operating system with WebSphere MQ Version 5.3,
you do not need to upgrade your operating system. Follow these steps to migrate
to WebSphere MQ Version 6.0 whilst keeping your WebSphere MQ data:
- End all WebSphere MQ activity.
- Check that the environment variable LD_ASSUME_KERNEL is set to
2.4.19 by typing the following command:
echo $LD_ASSUME_KERNEL
- If it is not correctly set, type the following command:
export LD_ASSUME_KERNEL=2.4.19
- Setting LD_ASSUME_KERNEL to 2.4.19 enables Linux Threads.
Accessing the RPM database whilst using Linux Threads can cause the database to
corrupt due to an error in RPM function on Red Hat Enterprise Linux 3.0. To
force RPM to run under the NPTL threading model, set the environment variable
RPM_FORCE_NPTL by typing the following command:
export RPM_FORCE_NPTL=1
- Uninstall WebSphere MQ Version 5.3.
- Unset the LD_ASSUME_KERNEL and RPM_FORCE_NPTL environment variables
by typing the following commands:
unset LD_ASSUME_KERNEL
unset RPM_FORCE_NPTL
- Check your system has the required WebSphere MQ prerequisites
and install WebSphere MQ Version 6.0 as described in
the following sections.
- Restart WebSphere MQ.