The Cardinality Estimator is a part of the query processos that helps to generate an appropriate query plan. This is important for producing the most efficient performance for your queries.
We have included a number of links that can help you learn more about the AlwaysOn suite of technologies, broken out by SQL Server version where applicable.
If you find broken links or have additional suggestions for information, please leave a comment in the discussion for this article.
SQL Server 2016
Continue learning more about SQL Server
View the index of features for the various versions.