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SQL Cluster - Multi Instance


SQL Cluster - Multi Instance

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hindle.steve
hindle.steve
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I have a SQL 2008 R2 Cluster name of say SQLCluster1 on NodeA with an instance name of Instance1 ie. SQLCluster1\Instance1. I also want to install another instance called Instance2 on NodeA/SQLCluster1 ie. SQLCluster1\Instance2.

Is this possible?

Thanks

Steve
calvo
calvo
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yes

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hindle.steve
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I thought so too but the documentation I have read doesn't seem to allow it. Do you have a link?
calvo
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Instances per computer. Scroll down and you'll see 50 instances per computer or 25 per failover cluster.

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hindle.steve
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But I don't see which option on the install screen allows me to do this?

I don't want to install a new SQL Cluster name with a named instance but a new instance to an existing SQL Cluster.

Am I missing the point?

Thanks

Steve
calvo
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You would install it just like you installed the first instance. Installation > New SQL Server Failover Cluster Installation.
There are prerequisites you need to meet before hand that have to do with the cluster disk resources and stuff, but installing it is no different than any other time.

instance 1
-Node A-Install New SQL Server Failover Cluster Installation
-Node B-Add Node to SQL Server Failover Cluster
sqlclust\instance1

instance 2
-Node A-Install New SQL Server Failover Cluster Installation
-Node B-Add Node to SQL Server Failover Cluster
sqlclust\instance2

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hindle.steve
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That's maybe the difference - I want to use the same disks as the first instance on SQLCluster1 is using?
calvo
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Gotta have a couple fresh disks for the new instance. If you install the second instance on the same disks as the first (which can be done after installation I believe) you can't do active/active and you stand the chance of losing both instances if a disk fails.

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hindle.steve
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Yes that makes sense.

So you can either have a default instance OR named instance for a SQL cluster, but not both. Also, you can't use the same cluster name more than once even using a different set of disks?
Elliott Whitlow
Elliott Whitlow
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You can only have one named instance per virtual name. As of SQL 2008R2 you couldn't add a second instance to an existing virtual name.

Keep in mind the various names and ip addresses involved in clustering
Node 1 Name, Node 1 IP Address
Node 2 Name, Node 2 IP Address
Cluster Virtual Name, Cluster IP Address
SQL Virtual Name 1, SQL IP Address 1 (named [only one per cluster] or default instance)
SQL Virtual Name 2, SQL IP Address 2 (named [only one per cluster] or default instance)

It seemed from a previous post that the SQL was being referenced this way [cluster virtual name]\[Instance Name], it *may work as long as the instance is on the same node as the cluster virtual name is residing on. The cluster virtual name is basically just the administration name for the cluster in the case of SQL.

CEWII
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