SQL Server 2016 Support for Distributed Transactions with Always On Availability Groups

One of the most promising new features of SQL Server 2016 is the the support of distributed transaction with Always On Availability Groups. They did make some improvements in that regard, but it is not yet fully supported.

DTC

Example of a Distribute Transaction
Source – SQL Server 2016 DTC Support In Availability Groups

In SQL Server 2016, Distributed Transactions are only supported if the transaction is distributed across multiple instances of SQL Server. It is NOT supported if the transaction is distributed between different databases within the same instance of SQL Server. So in the picture above, if the databases are on separate SQL instances it will work, but not if the databases reside on the same instance which is more likely.

If you require distributed transaction support between different databases within the same SQL Server instance and you want high availability you still must use a traditional SQL Server Always On Failover Cluster or a SANLess Cluster using DataKeeper.

SQL Server 2016 Support for Distributed Transactions with Always On Availability Groups

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s