Session monitoring of virtual desktops in a virtual machine farm

1. A method comprising:

writing, into a memory location by a host module operating on a computing device, information indicative of a status of a remote user session executing in conjunction with a guest operating system of a virtual machine, the virtual machine executing in a virtual environment comprising a plurality of virtual machines operating on the computing device;

when notifications indicative of a change to an asynchronous memory location are not available, polling, at one of a plurality of selectable rates, the status of the remote user session from the memory location by the host module, wherein the one selectable rate is selected based on a previous status of the remote user session written in the memory location, and wherein the status is usable to reconnect the remote user session;

when notifications indicative of a change to the asynchronous memory location are available, receiving information indicative of an updated status of the remote user session; and

updating a second computing device with the status of the user session.

2. The method of claim 1 , wherein the status of the remote user session is read from a registry key within the guest operating system.

3. The method of claim 1 , wherein the polling is performed by a virtualization manager program.

4. The method of claim 1 , further comprising tracking user sessions based on data received from the computing device.

5. The method of claim 4 , further comprising tracking a session state.

6. The method of claim 1 , wherein the host module is configured to operate in conjunction with a second operating system executing on the computing device.

7. A system adapted to connect a client computer to one of a plurality of virtual machines executing on one or more servers, comprising:

at least one computing device comprising a processor; and

at least one memory communicatively coupled to said at least one computing device when the system is operational, the memory having stored therein computer-executable instructions that when executed cause:

determining, by a host module, a current state of a user session operating on one of the virtual machines by polling a memory location at one of a plurality of selectable rates, wherein the one selectable rate is selected based on a previous status of the user session written in the memory location, and wherein the current state is usable to reconnect the user session;

reporting, by the host module, the determined current state to the one or more servers, wherein the current state is usable to connect remote computing devices with preexisting user sessions; and

reporting the current state by writing the current state to the memory location.

8. The system of claim 7 , wherein the memory location is a registry key within a guest operating system executing on the one virtual machine.

9. The system of claim 8 , wherein a virtualization manager comprises the host module, and wherein the virtualization manager is configured to poll values stored in the registry key.

10. The system of claim 7 , wherein the computer-executable instructions further cause tracking user sessions based on information received from the computing device hosting the virtual machine.

11. The system of claim 10 , wherein the information includes a session state.

12. The system of claim 11 , wherein the host module is configured to operate in a second operating system.

13. The system of claim 10 , wherein the user sessions are connected to a virtual machine using Remote Desktop Protocol (RDP).

14. A computer-readable storage device storing thereon computer executable instructions for enabling connection of a computer to one of a plurality of virtual machines executing on a plurality of servers, the computer-readable storage device storing thereon instructions for:

writing, into a memory location by a host module operating on a computing device, information indicative of a status of a remote user session executing in conjunction with a guest operating system of a virtual machine, the virtual machine executing in a virtual environment comprising a plurality of virtual machines operating on the computing device;

when notifications indicative of a change to an asynchronous memory location are not available, polling, at one of a plurality of selectable rates, the status of the remote user session from the memory location by the host module, wherein the one selectable rate is selected based on a previous status of the remote user session written in the memory location, and wherein the status is usable to reconnect the remote user session;

when notifications indicative of a change to the asynchronous memory location are available, receiving information indicative of an updated status of the remote user session; and

updating a second computing device with the status of the user session.

15. The computer-readable storage device of claim 14 , wherein the previous status is stored in memory location is a registry key within the guest operating system.

16. The computer-readable storage device of claim 15 , further comprising instructions for instantiating a virtualization manager program configured to poll values stored in the registry key.

17. The computer-readable storage device of claim 14 , further comprising instructions for reporting the status to a server configured to track user sessions based on the status.

18. The computer-readable storage device of claim 14 , further comprising instructions for instantiating a host module in a second operating system, the host module configured to read the status from a memory location within the guest operating system.