Migration Testing, Data Quality Checks, and Troubleshooting Errors – 295 hours in 8 months
After finishing the initial data cleanup, it was time to start testing our migration; the only way to identify major issues was to do a dry run. To set up for our initial testing, I took a MySQL dump of our AT database, loaded it up into an empty AT instance, and then installed the AT Migration Plugin. To install the AT Migration Plugin, just place the scriptAT.zip in your base AT plugins folder, either on a server or on your local machine.
Our first migration test did not go smoothly.