Uninstalling IBM Spectrum Scale Mpack and service

Before you upgrade Mpack on an HDP cluster, see Preparing the environment to check whether the new Mpack upgrade supports the HDP version installed on the cluster.

This topic lists the steps to uninstall IBM Spectrum® Scale Mpack and service.
  1. Follow the steps in Unintegrating HDFS Transparency and ensure that the ambari-server restart is run.
  2. Uninstalling the management pack and the IBM Spectrum Scale service

    On the Ambari server host, as root, execute the following script:

    $ python SpectrumScaleMPackUninstaller.py

    Follow the script and enter the required details.

    The SpectrumScaleMPackUninstaller.py script is in the download package along with the Mpack and license bin executables.

    The SpectrumScaleMPackUninstaller.py uninstalls the IBM Spectrum Scale Mpack and the IBM Spectrum Scale service from Ambari. It verifies the settings before it uninstalls the Mpack and IBM Spectrum Scale service. If the services are still running, and if the HDFS Transparency is not unintegrated, the SpectrumScaleMPackUninstaller.py script will exit and request user action.

If you face a Kerberos credential error when you are uninstalling the Mpack, see When you are uninstalling the Mpack, the Mpack uninstaller script might throw a Kerberos credential error even when the correct credentials were provided.

Note: Running this script does not remove the IBM Spectrum Scale packages and disks. The IBM Spectrum Scale file system is preserved as is. For the FPO cluster created through Ambari, the mounted local disks /opt/mapred/local* and entries in /etc/fstab are preserved as is.