Do I need DTC for my SQL Server?
The only time that DTC needs to be used is when more than one physical computer is going to be involved in an explicit distributed transaction. If you are going from one instance to another on the same server DTC will not be needed.
What is DTC in SQL cluster?
MSDTC is a separate Windows service which coordinates distributed transactions across SQL Server instances.
How can I tell if SQL Server DTC is enabled?
Right click Local DTC and click Properties to display the Local DTC Properties dialog box. Click the Security tab. Check mark “Network DTC Access” checkbox. Finally check mark “Allow Inbound” and “Allow Outbound” checkboxes.
Does SQL AlwaysOn require clustering?
SQL Server Always On is a flexible design solution to provide high availability (HA) and disaster recovery (DR). It is built upon the Windows Failover Cluster, but we do not require the shared storage between the failover cluster nodes.
What is the use of DTC in SQL Server?
A distributed transaction spans two or more databases. As the transaction manager, DTC coordinates the transaction between SQL Server instances, and other data sources.
Is MSDTC necessary?
Starting from Windows 2008, it is not mandatory to configure MSDTC to build a cluster. However, if you install MSDTC in a failover cluster, you need to specify the DTC resource IP address and shared storage.
How do I enable Distributed Transaction Coordinator in SQL Server?
Configure MSDTC
- Open Component Services.
- Expand Component Services, expand Computers, expand My Computer, expand Distributed Transaction Coordinator, right-click Local DTC, and select Properties.
- Select the Security tab.
- Select OK to save your changes.
- If prompted to restarted the MSDTC service, select Yes.
How do I find DTC properties?
In the window’s toolbar, select (the Properties button). Tip: Alternatively, you can right-click the Local DTC node, and then select Properties. The Local DTC Properties window appears, displaying the Tracing section. Select the Security tab.
Does SQL Server Standard support clustering?
SQL Standard Edition SQL Server Standard Edition will provide most functionality that administrators will want. This includes the most common type of mirroring, and clustering up to two cluster nodes.
What is the difference between clustering and always on?
An SQL AlwaysOn failover cluster instance provides high availability and disaster recovery at the SQL Server level. AlwaysOn Availability Groups (AAG) provide high availability and disaster recovery at SQL database level.
What is DTC in Windows cluster?
This topic describes the requirements and steps for clustering the Microsoft Distributed Transaction Coordinator (DTC) service for Always On availability groups.
How do I set local DTC properties?
Expand the Distributed Transaction Coordinator node, and then select the Local DTC node. In the window’s toolbar, select (the Properties button). Tip: Alternatively, you can right-click the Local DTC node, and then select Properties. The Local DTC Properties window appears, displaying the Tracing section.
What if SQL server cannot connect to a clustered DTC?
If SQL Server cannot connect to a clustered DTC, you will see an error message like the following: 2013-03-12 10:23:51.670 spid1001 QueryInterface failed for “DTC_GET_TRANSACTION_MANAGER_EX::ITransactionDispenser”:0x8007138f (The cluster resource could not be found.).
How do I add DTC to failover cluster manager?
To add DTC as a dependency of the SQL Server resource in Failover Cluster Manager: Right click on the SQL Server resource and select Properties. Click Insert. On the new line, from the dropdown select the DTC resource you created. An example is shown in Figure 14.
How do I add a clustered DTC resource to an availability group?
A valid available static IP address and the appropriate subnet mask for that IP address. Once you have created your Availability Group resource, create a clustered DTC resource and add it to the Availability Group.
Is there a reliable way to configure DTC for multiple SQL instances?
In fact, the only truly reliable way some of us have found was talked about by my friend and fellow Cluster MVP (also a big SQL guy), Mike Steineke ( blog | Twitter) in a post last week entitled “Clustered DTC and Multiple SQL Instances” where he shows how he had to configure DTC.