Tagged: dtc

What is this CIM I keep running into in Powershell?

I keep having to use CIM in my scripts, but what is it? I understand how to use it, but where did it come from and what does it stand for. Like every developer I know, a search engine is the best tool to solve this mystery.

There is an industry standards organization called DMTF (Distributed Management Task Force) that defined a standard named Common Information Model. By the way, this is the same group that defined MOF (Managed Object Framework) which is the standard below the covers of DTC. CIM is defined in the MOF standard and is a cross platform common definition of management information for systems, networks, and applications and services that allows for vendor extensions. How was that for acronym soup?

Mystery Solved.
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Configure MSDTC with PowerShell 4.0

Continuing on the PowerShell them from my last post, I wanted to save some knowledge on working with DTC in PowerShell. I am not going to list every command, just what I’ve used recently to configure DTC. You can find more infomarion on MSDN, http://msdn.microsoft.com/en-us/library/windows/desktop/hh829474%28v=vs.85%29.aspx or TechNet, http://technet.microsoft.com/en-us/library/dn464259.aspx.

View DTC Instances

Get-DTC will print a list of DTC instances on the machine.

PS> Get-Dtc

Stop and Start DTC

Stop

PS> Stop-Dtc -DtcName Local

Stopping DTC will abort all active transactions. So, you will get asked to confirm this action unless you turn off confirmation.

PS> Stop-Dtc -DtcName Local -Confirm:$False

Start

PS> Start-Dtc -DtcName Local

Status

You could use a script to confirm that DTC is started or stopped. When you call Get-Dtc and pass it an instance name it will return a property named “Status”. This property will tell you if the DTC instance is Started or Stopped.

PS> Get-Dtc -DtcName Local

Network Settings

You can view and adjust DTC Network Settings.

View

To veiw the network setting:

PS> Get-DtcNetworkSetting -DtcName Local

-DtcName is the name of the DTC instance.

Set

To set the network settings:

PS> Set-DtcNetworkSetting -DtcName Local -AuthenticationLevel Mutual -InboundTransactionsEnabled $True -LUTransactionsEnabled $True -OutboundTransactionsEnabled $True -RemoteAdministrationAccessEnabled $False -RemoteClientAccessEnabled $True -XATransactionsEnabled $False

Here we set the name of the instance to set values for then list the property value pairs we want to set. $True/$False are PowerShell parameters that return the boolean values for true or false respectively. If you try to run this set command, you will get a message asking if you want to stop DTC. I tried first stopping DTC then running this command and it still presented the confirmation message. You can add -Confirm:$False to turn off the confirmation message.

Conclusion

There is a lot more you can do, but this fits my automation needs. The only thing I couldn’t figure out is how to set the DTC Logon Account. There maybe a magical way of finding the registry keys and setting them or something, but I couldn’t find anything on it. If you know, please share…I’ll give you a cookie.

http://www.sqlha.com/2013/03/12/how-to-properly-configure-dtc-for-clustered-instances-of-sql-server-with-windows-server-2008-r2/ – Has some nice info on DTC and DTC in a clustered SQL Server environment. He even has a PowerShell script to automate configuration…Kudos. Sadly, his script doesn’t set Logon Account.