In just two hours from the Oracle Enterprise Edition to the Standard Edition on this occasion the several 100 gigabytes large databases-new server should pull back to right on one. Also, and here the challenge was Marie hospital by the Oracle Enterprise Edition wanted to switch back to the lower-cost Oracle Standard Edition. Alone the Edition change should take approximately 25 hours after the official, recommended by Oracle approach. For the clinic directors not an option, because it would have been an immense logistical effort, virtually shut down a hospital of this size for more than one day. Also, the emergency room for this time had must, close, what would have had serious impact on emergency care in all Stuttgart because the Marienhospital is focal point for emergency patients in the city. A new approach had therefore, in order to limit the system failure on the desired by the Marienhospital maximum two hours. Clearly a case for the merlin.zwo info design GmbH, which gladly accepted this exciting task. Not for nothing the Karlsruhe Oracle experts specialize, perform database upgrades with minimal system downtime since years.
For complex situation at the Marienhospital, merlin.zwo developed a process, Standard Edition reliably and in a fraction made possible the complicated return of the Enterprise Edition of the normal time and injured also no licenses. In the first step, a strategy and the task into steps that then should run in parallel through on-site by two merlin.zwo employees in cooperation with the IT Department of the Marie hospital. Step two was the test spot with a copy of the real database. While the complete conversion process was tested according to the merlin.zwo strategy from beginning to end with the full data volume. The time required for each task was measured, evaluated and optimized. So could be already in test mode, ensured that the systems of the Marie hospital be operational again after two hours would.