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

Set up a remote node for hosting DTC
DTC can be configured to use a remote host, which can be either a dedicated node
in the Matrix Server cluster or a stand-alone server outside of the cluster. This
configuration offloads the DTC hosting and allows the Virtual SQL Servers to fail over
while maintaining their DTC availability.
HP PolyServe Software for Microsoft SQL Server 4.1 administration guide 177