We are getting ready to upgrade our mission critical 24/7 application from 5.2 ml3 to 5.3 tl7. The application is called Credit Revue and uses a Progress database. It has many complicated components and interfaces. We have had several problems while upgrading test systems. We only have a few hours for an outage window at night to complete the production upgrade.
Based on our upgrades of the test systems we will likely have problems so we are looking at ways to minimize risk. We have a SAN and all file systems are on EMC DMX Symmetrix 1000 storage.
A different possibility is to create a new 5.3 tl7 LPAR. Get everything working perfectly in the new 5.3. On the night of conversion we would simply move all of the 5.2 file systems to the new 5.3 system. I think I could export all the 5.2 AIX Volume Groups with exportvg and then import or recreate on the new 5.3 using importvg or recreatevg. I would need to zone all of the LUNs (symmetrix devices) to the 5.3 system on the night of conversion and run cfgmgr and EMC's powermt config to present LUNs to the new 5.3.
Does this make sense? Any ideas on whether we should stick with the traditional upgrade or simply move all VGs/LUNs to the new "pristine" 5.3?
Based on our upgrades of the test systems we will likely have problems so we are looking at ways to minimize risk. We have a SAN and all file systems are on EMC DMX Symmetrix 1000 storage.
A different possibility is to create a new 5.3 tl7 LPAR. Get everything working perfectly in the new 5.3. On the night of conversion we would simply move all of the 5.2 file systems to the new 5.3 system. I think I could export all the 5.2 AIX Volume Groups with exportvg and then import or recreate on the new 5.3 using importvg or recreatevg. I would need to zone all of the LUNs (symmetrix devices) to the 5.3 system on the night of conversion and run cfgmgr and EMC's powermt config to present LUNs to the new 5.3.
Does this make sense? Any ideas on whether we should stick with the traditional upgrade or simply move all VGs/LUNs to the new "pristine" 5.3?