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Managing Serviceguard Fifteenth Edition > Appendix E Software Upgrades

Guidelines for Migrating a Cluster with Cold Install


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There may be circumstances when you prefer to do a cold install of the HP-UX operating system rather than an upgrade. A cold install erases the existing operating system and data and then installs the new operating system and software; you must then restore the data.

CAUTION: The cold install process erases the existing software, operating system, and data. If you want to retain any existing software, make sure you back up that software before migrating.

Checklist for Migration

Use the following as a checklist to prepare the migration.

CAUTION: This is a checklist, not a precise set of steps.
  1. Back up the data, including databases, user and application data, volume group configurations, etc.

    NOTE: Data on shared disks, or on local disks in volumes that are not are touched by the HP-UX installation process, will not normally be erased by the cold install; you can re-import this data after the cold install. If you intend to do this, you must do the following before you do the cold install:
    • For LVM: create a map file for each LVM volume group and save it as part of your backup.

    • For VxVM: deport disk groups (halting the package should do this).

    See “Creating the Storage Infrastructure and Filesystems with LVM and VxVM” for more information.

  2. Halt the cluster applications, and then halt the cluster.

  3. Do a cold install of the HP-UX operating system. For more information on the cold install process, see the HP-UX Installation and Update Guide for the target version of HP-UX: go to http://docs.hp.com, choose the target version of HP-UX under Operating Environments and then choose Installing and Updating.

  4. Install any additional required software that did not come with your version of the HP-UX Operating Environment.

  5. Install Serviceguard. The Serviceguard version must be compatible with the version of HP-UX installed in item 3 of this list. See the Serviceguard, SGeRAC, and SMS Compatibility and Feature Matrix, at http://docs.hp.com -> High Availability -> Serviceguard.

  6. Recreate any user accounts needed for the cluster applications.

  7. Recreate the cluster as described in Chapter 5 “Building an HA Cluster Configuration”.

  8. Restart the cluster.

  9. Reinstall the applications.

  10. Restore or re-import the data.

  11. Recreate and run the cluster packages as described in Chapter 6 “Configuring Packages and Their Services”.

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