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MSSQL 2000 and 2005 COEXIST on CLUSTER??


MSSQL 2000 and 2005 COEXIST on CLUSTER??

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BrightonDBA
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Has anyone had experience of this. We have a requirement to upgrade a production box and the easiest way would be to install 2005 onto the existing 2000 failover cluster, then uninstall 2000.

I've done this on a non-clustered box before and all is well. ( Got bitten by the DTS but thats not an issue here.)

I'd like to test but have no resources at present.

Any thoughts welcome.

Cheers
G
MarkusB
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Yes you can have SQL 2000 and 2005 instances on one cluster as long as each of them is in it's own cluster group. I've done it a couple of times during an upgrade project and never had any problems.

Markus Bohse
Sam Greene
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Does the additional instance use its own IP and Network name?
MarkusB
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sam (11/13/2008)
Does the additional instance use its own IP and Network name?


Yes, each instance has it's own cluster group with virtual ip address and name.

Markus Bohse
Schadenfreude-Mei
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This shouldnt be a problem for you. SQL 2005 clusters very easily. Like MarkusB said, make sure you have second failover group and the virtual-instance name is different and you give it a different IP address.

I had a gotcha with MSDTC once so if you use it make sure it has its own drive (not sure why but that is the only way we managed to get ours working. In its own group too!).

Adam Zacks

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BrightonDBA
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Thanks to All for these replies.

As it happens I've dodged the bullet by deciding to do a straight to upgrade to 2005. Didn't need the second instance in the end.

That said anyone had any problems upgrading on a cluster . . . . ? !!
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Never tried. Good luck Smile

Adam Zacks

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Microsoft also recommends that you have applied service pack 4 to your SQL 2000 instances before installing SQL 2005 on the same cluster.

This would also need to be done if you are planning to upgrade your SQL 2000 instances to 2005 in the future.
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