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SQL Server 2005 clustering server in vertual environment

Posted on 2009-07-13
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Expert,

Any common for SQL Server 2005 clustering server built by vertaul machine? Is that the same the sql server clustering server built in physical workstation for failover and performance?

Thank,
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Question by:yrcdba7
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by:DBAduck - Ben Miller
DBAduck - Ben Miller earned 2000 total points
ID: 24852688
Clustering is the same in concept and implementation on Virutal Machines as it is on physical hardware.  The performance is not as high, but it can be tuned.  The main thing is the underlying hardware that the virtual machines are sitting on.

I have created both virtual and physical clusters and the setup is the same as far as SQL Server is concerned.
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by:yrcdba7
ID: 24854344
Expert,

Can you explain more detail for what you posted, I don't really follow it,
----- ID:24852688
The performance is not as high, but it can be tuned.  The main thing is the underlying hardware that the virtual machines are sitting on.

I have created both virtual and physical clusters and the setup is the same as far as SQL Server is concerned.
----

Thank you, dba
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DBAduck - Ben Miller earned 2000 total points
ID: 24854698
My comment is related to the performance of SQL Server running on a Virtual Machine.  Because the virtual machine is running on a hard drive that is on a hard drive, performance can suffer.  But my understanding is that with the tuning of the Virtual Machine (which means what type of drive structure is the VM on, etc) and also the tuning of where the database files are, like on a high speed SAN or the data files are on a RAID 5 and the Transaction Logs are on RAID 10 and TempDB is on a scratch drive, then you have tuned SQL Server to run well on a VM.

Most of the clustering, regardless of whether you are on a VM or a physical machine, is faster or more performant when you are tuning the disk structure and how you configure your SQL Server to run.

Does that help?
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