4.0.0 HP PolyServe Software for Microsoft SQL Server Administration Guide (T5392-96056, March 2010)

Add the Virtual MSDTC Service
The Virtual MSDTC Service provides a monitor that periodically checks whether the MS DTC NT
service is up on the primary node for the Virtual MSDTC and whether the MS DTC data path is
accessible from that node. You can add one Virtual MSDTC Service to a Virtual MSDTC.
To add the Virtual MSDTC Service, select the Virtual MSDTC on the PolyServe Management Console,
right-click, and select Add Virtual MSDTC Service.
Virtual data root: Specify a shared PSFS filesystem. The path must be common for all nodes participating
in the Virtual MSDTC. (In mx commands, the virtual data root is referred to as the vpath.)
Optional Components: When you add a MSDTC Service to a Virtual MSDTC, HP PolyServe Software
creates a monitor that watches the MS DTC NT service. When the monitor detects a failure of the NT
service, HP PolyServe Software can try to restart the service instead of immediately failing the Virtual
MSDTC over to the backup node. The optional component Restart Attempts allows you to specify the
number of attempts that should be made. The default is one attempt.
Probe Configuration: The frequency is the interval of time, in seconds, at which the monitor runs its
probe. The default setting is 20 seconds. The timeout is the maximum amount of time that will be
waited for the probe to complete. The default timeout interval is 15 seconds.
NOTE:
The probe behavior of the MSDTC Service monitor differs from the default behavior of the service
monitors provided with Matrix Server. In Matrix Server, the monitor probes the associated service on
all nodes on which it is configured. The MSDTC Service monitor probes the MSDTC service only on
the node where the Virtual MSDTC is active.
The Advanced button on the Add MSDTC Service window displays options that can be used to tailor
the monitor for your environment. These options are the same as the advanced options for SQL
monitors. See “Advanced options for monitors” on page 63, for more information.
To add a Virtual MSDTC Service from the Command Prompt:
mx vmsdtc_service add --vpath <path> [arguments] <vmsdtc\msdtc>
See the HP PolyServe Matrix Server command reference guide for information about the arguments.
The following view of the Virtual Hosts tab shows the Virtual MSDTC Service configured on a Virtual
MSDTC.
Configure Virtual MSDTC80