Upgrade to SQL 2008 R2

Hello,

I have a database in SQL 2008 R2 I would like to move to a cluster.

I have only clusters in SQL 2008 10.0.2531, 10.0.2573 so no R2

Reading the document http://msdn.microsoft.com/en-us/library/ee210714.aspx#Updating it is possible to have both SQL 2008 and SQL 2008 R2 coexisting.

But some confuse considerations:

in the middle:

NoteNote
If you are installing a new instance of SQL Server 2008 R2, you can unselect the shared components during installation. This keeps the unselected components at the existing version of SQL Server 2008.

at the end

Considerations for Updating Side by Side Instances of SQL Server 2008 and SQL Server 2008 R2.
If you have a SQL Server 2008 R2 instance installed side by side with a SQL Server 2008 instance, you need to download and install the updates specific to each version.
When you install a SQL Server 2008 R2 instance side by side with a SQL Server 2008 instance, the shared components are upgraded to SQL Server 2008 R2. If you later decide to uninstall the SQL Server 2008 R2 instance, you still need to download and install SQL Server 2008 R2 updates to the shared components.
SQL Server 2008 R2 Setup includes the installation of the SQL Server 2008 setup support files even if there is no existing SQL Server 2008 instance on the same machine. It is therefore a good practice to download SQL Server 2008 updates to keep the SQL Server 2008 setup support files up to date.

So is it really possible to upgrade by creating a new instance without impacting the rest of the databases on the cluster?

Thanks,
Dom

System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager