Planning Volume 2, Control Workstation and Software Environment

Reviewing your migration steps

This section summarizes the key components of a migration. Review and assess these components, consider them from a sizing and impact point of view, and qualify them with respect to your overall migration goals and strategy. Additional details on these steps can be found in the PSSP: Installation and Migration Guide.

1. Determine your migration goals (which nodes, how many nodes)
2. Determine your migration strategy. Be certain that you understand coexistence limitations.
3. Plan your migration windows
4. Plan your recovery procedures
5. Gather necessary materials:
   • new release levels of AIX and PSSP
   • documentation - for AIX, PSSP, other licensed programs, required AIX and PSSP service (for older levels)
   • new release levels of other licensed programs used
   • any additional DASD required, resources (like tape) for backups
6. Create system backups - control workstation, nodes to be migrated
7. Conduct the migration, in stages as applicable:
   1. Apply required service to nodes prior to migration (required PTFs are necessary for coexistence to work)
   2. Prepare the control workstation (such as DASD, PTF service, archive the SDR)
   3. |Migrate the control workstation to the latest level of PSSP (and AIX |4.3.3 if necessary), validate
   4. |Migrate the control workstation to AIX 5L 5.1 if desired, |validate
   5. Partition the system (might be necessary due to coexistence limitations)
   6. Migrate a test node to the latest level of PSSP (optional but highly recommended)
   7. |Migrate boot-install servers to the latest level of PSSP and AIX |that is to be used on any nodes they support
   8. Migrate any remaining nodes to the latest level of PSSP (and AIX if necessary)

   Note:

   Complete and verify each step before going on to the next step.

8. Perform postmigration activities