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

HP PolyServe Software for Microsoft SQL Server utilizes the PSFS cluster filesystem,
in which all nodes in the cluster can simultaneously read/write to a file on the shared
disk. On failover, the backup node simply starts up SQL Server and mounts the data
on the shared disk. There is relatively little cost in transition or data movement.
Whether SQL Server is running as stand-alone or clustered, MS DTC is needed if
SQL Server (or Virtual SQL Server) needs to maintain a transaction spanning across
multiple data sources. Although, as shown in the following section, HP PolyServe
Software can transparently virtualize DTC service on the active node (this option is
enabled by checking the MSDTC checkbox), only one DTC-enabled Virtual SQL
Server can be active on a node. Other DTC-enabled Virtual SQL Servers will not be
able to fail over to this node.
Set up local MS DTC-enabled Virtual SQL Servers
This configuration allows the host for the Virtual SQL Server to utilize the local DTC
service for distributed transactions. The DTC service is attached to the Virtual SQL
Server engine and will fail accordingly.
Hosting Configurations for MS DTC172