What is the 6R model for migration

[bob]

You need to know the 6R model for your migration tasks. I found it really useful in admin roles. You apply these strategies to different parts of your setup. Rehosting lets you move servers as they are. You save time but might miss optimizations. And re platforming allows some tweaks during the move. You change the platform slightly for better fit. But you keep most of the code intact. Refactoring requires rewriting parts of the application. You gain efficiency from this effort though. Now repurchasing means buying new services instead. You drop old ones and shop for replacements. Perhaps retiring old systems frees up resources. You remove what no longer serves you. Retaining keeps certain elements in place. You decide based on needs and costs. You weigh the benefits for each choice. I often start with assessing your current systems first. Then you pick the right R for the job. Maybe you rehost for quick wins. Or you refactor for long term gains. And this helps in IT admin interviews too.
You think about your workloads when using the model. I suggest mapping out everything you have. You identify what can move easily. Rehosting works for simple cases often. But you check compatibility issues beforehand. And perhaps replatforming fits databases better. You adjust the underlying structure a bit. Then refactoring comes in for custom apps. You invest time to improve performance. Now you might repurchase for standard tools. You switch to cloud services quickly. Or retiring unused apps cuts expenses. You focus resources on active parts. Retaining applies to sensitive data setups. You leave them on premises sometimes. You test small batches to see results fast. I recommend starting with low risk items first. And you avoid big disruptions this way. Perhaps you rehost most legacy parts. But you refactor the core business logic. You gain better control over updates later. Now repurchasing shines for email tools. You cut maintenance headaches right away. Or retiring frees hardware for new uses. You save on power and space too.
Retaining works when rules block full moves. I see this in regulated setups often. You keep control while shifting others. And you blend multiple Rs across projects. You learn by doing small tests first. Perhaps re platforming speeds up some databases. But you watch for hidden costs always. You track metrics after each change. Now you plan for staff training needs. Or you might retain for compliance reasons. You balance speed with stability overall. I push for clear goals before picking. And this model guides your choices well. You compare options side by side mentally. Perhaps retiring old reports simplifies audits. But you document every step taken. You build skills that impress in interviews. Now rehosting proves handy for quick lifts. You focus effort where it counts most.
You review your inventory often during this. I mix these ideas in daily work. And you adapt based on what fits. Perhaps you repurchase SaaS options next. But you weigh lock in risks too. You test backups after moves always. Or refactoring boosts your app speed. You see real gains from that work. Now retaining suits certain file shares. You avoid unnecessary changes there. You prepare for mixed outcomes too. I share tips like this with juniors. And you grow faster with practice. Perhaps re platforming eases some shifts. But you monitor performance closely after. You adjust plans if needed fast.
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