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Donald K. Burleson

Oracle Tips  

Test the Oracle Migration Process

I bet the Donner party wished they could have tested their migration plan; and I’ll bet the lemmings that dashed off the cliff into the sea did as well. If at all possible, even if it is on a small database that you create specifically for the test (in fact, this is the best way), test your migration path. Repeat the test until you are sure exactly what you are doing. I know the bosses will be yelling if you are a bit late with the production migration, but I’ll bet the Donner party wished they had been late for their date with history. Hurrying to meet a schedule is probably the best path to meet disaster I know of. When we rush, we forget important steps, overlook potential problems, and just do stupid things.

Test the Migrated Test Instance

If you are lucky enough to have the space available to do a nonproduction test migration, be sure to have test plans available to verify that what you ended up with is at least as good as what you started with. Find the causes of any anomalous behavior and fix them before you spend all weekend migrating your production database only to have it malfunction--when the boss is looking of course.

Protect Your Retreat Path

Damn the torpedoes! Full speed ahead! May be fine for Naval engagements but it is no way to migrate an Oracle instance. Protect your retreat path by ensuring you have a complete backup of your Oracle8i or earlier release instance.

This is an excerpt by Mike Ault’s book “Oracle Administration & Management”.  If you want more current Oracle tips by Mike Ault, check out his new book “Mike Ault’s Oracle Internals Monitoring & Tuning Scripts” or Ault’s Oracle Scripts Download.




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