There is zero performance impact when running a single instance cluster. The SQL Server runs on one of the hardware resources in the cluster, when it fails, it moves to the other hardware resource. The SQL Server has absolutely no clue that it is running on a cluster and unless someone told you, you would have no way of knowing you were connecting to a SQL Server running on a cluster or one running on a single machine. It's transparent and is supposed to be that way.
For More Information
- Dozens more answers to tough SQL Server questions from Michael Hotek are available here.
- The Best Microsoft SQL Server Web Links: tips, tutorials, scripts, and more.
- The Best SQL Web Links
- Have a SQL Server tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical SQL Server questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig Deeper on Microsoft SQL Server Performance Monitoring and Tuning
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.