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SERVER OS and DB Migration

Team,
 Find the attached existing setup. Planning to migrate to OS 2008 R2 64 bit in all servers and SQL 2008 64 bit in Database Servers without disturbing day to day work. Please find the plan,

Suggest.
Current-Setup.jpg
Steps-and-suggestion.docx
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dinagaran2000
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dinagaran2000
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DaveCommented:
You can't have two servers with same name on the network at the same time so you either have to re-configure app to talk to servers with different names or look at renaming servers.

I would upgrade Active Directory first.

Is all this physical servers? I also would look at using Virtualization to provide hardware resilience.
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dinagaran2000Author Commented:
Sorry. I think VM wont perform well for SQLDB in cluster mode.
Will Domain and additional domain can be upgraded from 2003 R2 32 bit to 2008 R2 64 bit without formatting?
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DaveCommented:
1. Whilst an  upgrade from 2003r2 to 2008r2 won't actually re-format the disk it doesn't preserve any applications or profiles.

2. Sorry , certainly in Hyper-V SQLDB will perform well in cluster mode, but I wouldn't run it in cluster mode. I would use VMware HA to provide hardware resilience. In Hyper-V use HyperV clustering rather than SQL clustering. I can't comment on SQL performance in Hyper-V.
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dinagaran2000Author Commented:
Sorry Team,
          We have dropped the DB migration as of now
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dinagaran2000Author Commented:
We dropped the migration as of now
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