The WMI ExchangeClusterResource class has 5 properties:
1) Name: returns name of Exchange cluster resource
2) Type: specifies the cluster resource type (IP Address, network name, etc.)
3) Owner: specifies the cluster node that the resource is running on (changes with failover)
4) VirtualMachine: returns name of the Virtual Machine that owns the resource
5) State: Shows the current state of resource, returns a numerical value.
The value I get for all online resources is 2 – but I haven’t been able to find any cross-reference that translates the numbers into something, except for the Windows Clustering section of the Platform SDK that mentions the following values (not-numerical) for the GetClusterResourceState function.
| Return Code | Description | |
|---|---|---|
| ClusterResourceInitializing | The resource is performing initialization. | |
| ClusterResourceOnline | The resource is operational and functioning normally. | |
| ClusterResourceOffline | The resource is not operational. | |
| ClusterResourceFailed | The resource has failed. | |
| ClusterResourcePending | The resource is in the process of coming online or going offline. | |
| ClusterResourceOnlinePending | The resource is in the process of coming online. | |
| ClusterResourceOfflinePending | The resource is in the process of going offline. | |
| ClusterResourceStateUnknown | The operation was not successful. For more information about the error, call the Win32 function GetLastError. |
Assuming these values map serially to the numerical values returned by the WMI class, 2 would mean the resource is operational and functioning normally.
However, when moving the MSDTC resource, the numerical value returned while the resources were moving was 129. That blows holes in the theory.
http://doc.ddart.net/msdn/header/include/clusapi.h.html
ClusterResourceStateUnknown = -1,
ClusterResourceInherited = 0,
ClusterResourceInitializing = 1,
ClusterResourceOnline = 2,
ClusterResourceOffline = 3,
ClusterResourceFailed = 4,
ClusterResourcePending = 128,
ClusterResourceOnlinePending = 129,
ClusterResourceOfflinePending = 130
I need to implement a cluster aware application on Win2003 cluster server with 2 nodes , can you tell me a way to start.
Currently the application works fine as a standalone application.
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