4.1.0 HP PolyServe Software for Microsoft SQL Server administration guide (T5392-96074, October 2010)

B Hosting Configurations for MS DTC
The information in this appendix applies to MS DTC when it is managed by a Virtual
SQL Server (the “Manage msdtc” option is enabled in the Virtual SQL Server
configuration). If you are configuring MS DTC for high availability, as described in
Chapter 4, refer to that chapter for MS DTC configuration information.
Overview
The information in this appendix applies to MS DTC when it is managed by a Virtual
SQL Server (the “Manage msdtc” option is enabled in the Virtual SQL Server
configuration). If you are configuring MS DTC for high availability, as described in
Chapter 5, refer to that chapter for MS DTC configuration information. Overview
The Microsoft Distributed Transaction Coordinator (MS DTC) is the transaction
manager responsible for coordinating transaction atomicity across multiple resource
managers. It ensures that an update of data (work) is either committed or rolled back
on all servers that are participating in the transaction. As shown below, the client
connects to Server A and invokes a remote call to Server B, which employs MS DTC
to manage the transaction across these two servers. With the help of DTC, the work
is guaranteed to either commit or rollback on both servers.
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