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Measures reported by VmgRdpClientTest
A Virtual Desktop Infrastructure (VDI) is a shared environment in which multiple users connect to desktops hosted by virtual machines executing on an ESX host from remote terminals using the Remote Desktop Protocol (RDP). One of the key factors influencing user experience in such an environment is the latency seen by the users when connecting to a virtual desktop. High network latencies or packet losses during transmission can cause significant slow-downs in request processing by the desktop. Hence, monitoring latencies between the virtual desktop and individual client terminals is important. The VmgRdpClientTest is executed by the eG agent on an ESX host. This test auto-discovers the virtual desktops on the ESX host, the users who are currently logged on to each of the virtual desktops, and the IP address from which they are connecting to the virtual desktops. For each user, the test monitors the quality of the link between the client and the virtual desktop.
Using this test, an administrator can identify user sessions that are being impacted by high latencies or by excessive packet drops. In some cases, a virtual desktop may regard a user session as active, even though the network link connecting the user terminal to the virtual desktop has failed. The VmgRdpClientTest alerts administrators to such situations.
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| No_of_sessions |
The current number of sessions for a particular user |
Number
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The value 0 indicates that the user is not currently connected to the guest operating system. |
| Avg_delay |
Indicates the average delay between transmission of a request by the agent on a virtual desktop and receipt of the response back from the user terminal. |
Secs |
Comparing the value of this measure across users will enable administrators to quickly and accurately identify users who are experiencing higher latency when connecting to a virtual desktop. |
| Min_delay |
Indicates the minimum delay between transmission of a request by the agent on a virtual desktop and receipt of the response back from the user terminal. |
Secs |
A significant increase in the minimum round-trip time is often a sure sign of a poor link between the desktop and a user's terminal. |
| Pkt_loss_pct |
Indicates the percentage of packets lost during data exchange between the virtual desktop and the user terminal. |
Percent |
Comparing the value of this measure across users will enable administrators to quickly and accurately identify users who are experiencing slowdowns because of poor performance on the network links between their terminals and the virtual desktop. |
Note:
- If the same user is connecting to a virtual desktop from multiple client terminals, the value of the No_of_sessions, Avg_delay, and Pkt_loss_pct measures will be averaged across all the sessions of that user. The Min_delay measure, on the other hand, will display the least value reported for Min_delay across all the sessions of that user.
- When a user logs out, the number of sessions will be reduced by 1. If the number of user sessions becomes 0, the corresponding entry for that user in the eG user interface will be removed after a short period of time.
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