Does TransactionScope require MSDTC?

Does TransactionScope require MSDTC?

So remember, the connection must be opened inside the TransactionScope block for it to enlist in the ambient transaction automatically. The transactions are promoted automatically to distributed transactions when needed and the MSDTC becomes involved. TransactionScope does not obviate the need for MSDTC.

Is MSDTC required for SQL 2016 cluster?

You might see MSDTC clustered service in a Windows failover cluster along with SQL Service. Starting from Windows 2008, it is not mandatory to configure MSDTC to build a cluster. In case you do not configure MSDTC in the failover cluster, SQL Server uses the MSDTC running locally on the node.

How do I avoid Msdtc?

Implementing Database Connection Scopes MSDTC is avoidable if you use the same connection for multiple database call. Period. This is the fundamental key to prevent queries from being escalated when MSDTC is enabled.

Why is Msdtc needed?

MSDTC is used by SQL Server and other applications when they want to make a distributed transaction between more than one machine. A distributed transaction is simple a transaction that spans between two or more machines. If you are going from one instance to another on the same server DTC will not be needed.

How do I know if msdtc is running?

Type net start msdtc , and then press the ENTER button. Open the Component Services Microsoft Management Console (MMC) snap-in. To do this, click Start, and then click Run Type dcomcnfg.exe, and then click OK.

How do I configure msdtc?

Configure MSDTC

1. Open Component Services.
2. Expand Component Services, expand Computers, expand My Computer, expand Distributed Transaction Coordinator, right-click Local DTC, and select Properties.
3. Select the Security tab.
4. Select OK to save your changes.
5. If prompted to restart the MSDTC service, select Yes.

When does TransactionScope escalate to DTC in SQL Server?

Caveat #1: If those multiple SqlConnections are nested, that is, two or more SqlConnections are opened at the same time, TransactionScope will immediately escalate to DTC. Caveat #2: If an additional SqlConnection is opened to a different ‘durable resource’ (ie: a different SQL Server,) it will immediately escalate to DTC

Can you use multiple sqlconnection’s in one transactioncope?

SQL Server 2008 can use multiple SQLConnection s in one TransactionScope without escalating, provided the connections are not open at the same time, which would result in multiple “physical” TCP connections and thus require escalation. I see some of your developers have SQL Server 2005 and others have SQL Server 2008.

When does DTC escalate to second sqlconnection?

Caveat #2: If an additional SqlConnection is opened to a different ‘durable resource’ (ie: a different SQL Server,) it will immediately escalate to DTC Does not allow multiple connections within a single TransactionScope, period. It will escalate when/if a second SqlConnection is opened.

Why are local transactions no longer promoted to distributed transactions?

In this case, a distributed transaction adds unnecessary overhead that decreases performance. Starting with SQL Server 2008 and version 3.5 of the .NET Framework, local transactions are no longer promoted to distributed transactions if another connection is opened in the transaction after the previous transaction is closed.