Hello Troy,
I assume you meant the general SAP upgrades, depending on which sap upgrade, but most of the sap upgrade in real time work environment which should allow you to choose between two upgrade strategies. The downtime-minimized strategy enables you to run the production system and shadow system in parallel. This requires extra system resources, but reduces downtime.
The resource-minimized strategy enables you to run either the production system or the shadow system. This strategy requires no extra system resources. However, the downtime is longer, since you can only run the shadow instance during downtime.
I hope this is what you asked for, if you found them useful do award some points.
Thanks,
George
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