Where is wmi data stored

Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. This opened my notepad. Information gathered by WMI is stored in a collection of system files called a repository. Information is moved through the repository by using a staging file. If repository data or the staging file becomes corrupt, WMI might not function properly. This condition is usually temporary, but you can safeguard against it by backing up the repository file manually, as mentioned above.

Sign up to join this community. This will connect you to the default repository on the local system. Once connected, use the "Enum Classes" button to list all of the classes available in the current namespace. Switch the option to Recursive to ensure you get the complete list. Then double click a class name in the result to open the details about it. Finally, press the Instances button to open another window with a list of the instances of that class type. Now that we've learned about what WMI is, let's think about some real-world use cases.

Since it's so easy to connect to and retrieve data from remote machines with PowerShell, a very common use for WMI is to discover data about multiple systems at once.

For example, if you are decommissioning an AD Domain Controller, you might want to search all the servers in the environment to see if any are using it for DNS resolution. Here is a code sample that will find all servers that have the "MyService" service installed:. Get and display the data from the WQL query. This method links the data objects to an IWbemClassObject pointer that is passed into the method.

The following code example is used to get the Name property from the data object, which provides the name of the operating system. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. The monitor itself does nothing but watch or monitor data as it is generated. Monitors do not log or store data, although they can be set up to write data to a logfile or to the Event Viewer if a certain condition is met.

WMI providers respond to direct queries from management applications or scripts as well as to programmed events. Configuring an event requires an event trigger and event subscribers.

The trigger is set by defining when an event becomes reportable or triggered. For example, an event might be triggered when the amount of free disk space drops below a certain amount. As the WMI provider runs, it simply monitors the amount of free disk space. The CIM Object Manager then forwards the alert to the predefined event consumers or subscribers, which are typically enterprise management applications or event logs.

Each WMI provider implements the functionality of its classes. Classes contain events and properties that allow for the actual capture and setting of data. CIM classes can be used when building new classes. The new classes will inherit properties from their parent CIM class.

There are also standard consumer classes. These are used to run scripts or programs when a triggering event occurs. One commonly used standard consumer class is the ActiveScriptEventConsumer , which runs a script when it receives a response.

This is a way to create an automatic response to a particular event or situation, such as sending a message, stopping or starting a service, or even rebooting and shutting down a system or component. Some classes have methods that offer the specific data that may be monitored or altered. These methods can be accessed via a scripting application or via a network management application. Dynamic data monitored by WMI providers is not stored in the repository. Accessed from the application-side by the WMI API, the Object Manager forwards requests for data to the WMI providers and receives the reply before forwarding the information back to the requesting management application.

These respond via the classes and methods with data such as system uptime or the number of running processes.