Failover Cluster Control Codes
The Cluster API defines a small set of control code functions—one for each cluster object—as "generic" interfaces to a wide range of cluster operations. Control codes—32 bit values used as function parameters—determine the kind of operation a control code function will perform. Together, the control code functions and the control codes support nearly every kind of cluster functionality.
Control codes are 32-bit integers used to describe an operation on a cluster object. Control codes are categorized as internal or external:
- Applications use external control codes in control code functions to read, validate, and set properties and to perform a variety of other operations on cluster objects.
- The Cluster service uses internal control codes to notify resource DLLs of changes affecting resources or resource types.
It is important to become familiar with the capabilities of the control codes. Applications and resource DLLs should always use control codes, if possible, to perform operations on cluster objects. The control codes are designed to maximize security, protect the cluster database, and ensure resource DLL notification.
In this section
- Cluster Control Codes
- Collection Control Codes
- Group Control Codes
- Network Control Codes
- Network Interface Control Codes
- Node Control Codes
- Resource Control Codes
- Resource Type Control Codes
Related topics