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Installing 2nd instance on multi-instance sql 2008 cluster

Posted on 2011-03-07
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Last Modified: 2012-05-11
We are installing a mulit-instance sql server 2008 cluster.  If we install the failover cluster on node a and then install the add node to node b - what is the next step?  Should we add the second instance to node a even though we want it to run on node b (and then I guess change the preferred node in cluster admin) or do we add the second instance on node b and then install the add node on the other server?  Alos, are there any other options to consider - possibly installing both instances first and then installing the add node feature of both afterwards?  Are there any other things to consider with this type of install?
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Question by:PiedmontHealth
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Expert Comment

by:dba2dba
ID: 35061236
Below would be the steps:

1) setup the Node A as a single node windows cluster and install SQL Server
2) Add the node B to the current single node cluster
3) run setup on the second node and it will promt you to select whether it is a new sql installation or adding node to existing instance. you need to select the appropriate existing instance.

The behavior is Step3 is new to sql 2008. You need to install sql in both nodes in sql 2008 which is not the case in earlier versions.

IMO, this is the only way to perform this task.

THanks,
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Author Comment

by:PiedmontHealth
ID: 35061316
Yes, but now I want to add a second instance of SQL to the cluster.  Node A will run one instance and node B will run the second instance (unless of failover in which case both instances will run on one).  My question is:  when I install the second instance of SQL, do I start on Node B (since that is where it will primarily run) or do I start on Node A (since that is where I started the initial install of the first SQL instance?
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dba2dba earned 500 total points
ID: 35061528
It will not matter where you start the Install, you can start on any instance of your choice. Once the install is complete you can failover to desired node if needed.

Thanks,
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Author Closing Comment

by:PiedmontHealth
ID: 35110856
The solution was accurate but more elaboration would have been helpful.  I didn't feel totally comfortable and ended up talking with someone at Microsoft who elaborated that I should install the first instance completely (both nodes) and then install the second instance.   It didn't matter which node I started the second instance on.  I had also requested to know if there were other concerns with this type of install - and of course there were, but no mention of this part of the question in the response.
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Expert Comment

by:dba2dba
ID: 35111924
PiedmontHealth: - Thanks for the feedback. I will try to be more elaborate in my replies. Also, Please don't hesitate to ask for a more elaborate answer if needed - Thats what I do with the questions I post too.
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