Product Documentation

Analytics: HDX Insight

Jan 12, 2017

HDX Insight provides end-to end visibility for ICA traffic passing through NetScaler ADC.

HDX Insight enables administrators to view real-time client and network latency metrics, historical reports, End-to-end performance data, and troubleshoot performance issues.

Availability of both real-time and historical visibility data enables NetScaler MAS to support a wide variety of use cases.

The following Thin Clients support HDX Insight:

  • WYSE Windows based Thin Clients
  • WYSE Linux based Thin Clients
  • WYSE ThinOS based Thin Clients
  • 10Zig Ubuntu based Thin Clients

This document includes the following details:

Identifying the root cause of slow performance issues

Scenario 1

User is experiencing delays while accessing XenApp and XenDesktop.

The delays might be due to latency on the server network, ICA traffic delays caused by the server network, or latency on the client network.

To identify the root cause of the issue, analyze the following metrics:

  • WAN Latency
  • DC Latency
  • Host Delay

To view the client metrics

1. On the Analytics tab, navigate to HDX Insight > Users.

2. Scroll down and select the user name.

3. On the Current Application Sessions table, hover the mouse over the RTT value and note the host delay, DC latency, and WAN latency values.

On the Current Application Sessions table, click the hop diagram symbol to display information about the connection between the client and the server, including latency values.

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Summary

In this example, the DC Latency is 1 millisecond, the WAN latency is 592 milliseconds and Host Delays is 0 seconds.

This indicates that the user is experiencing delay due to latency caused by the client network.

Scenario 2

User is experiencing delay while launching an application on XenDesktop or XenApp

The delay might be due to latency on the server network, ICA-traffic delays caused by the server network, latency on the client network, or time taken to launch an application.

To identify the root cause of the issue, analyze the following metrics:

  • WAN latency
  • DC Latency
  • Application Launch Duration

To view the user metrics

1. On the Analytics tab, navigate to HDX Insight > Users.

2. Scroll down and click on the user name.

3. In the graphical representation, note the WAN Latency, DC Latency and RTT values for the particular session.

4. In the Current Application Sessions table, click the first session ID.

5. Scroll down, and in the Applications pane, from the dropdown list, select Launch Duration to view the time taken for the application to launch

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Summary

In this example, the DC Latency is 1 millisecond, the WAN latency is 13 milliseconds, and the Launch Duration value of 2.37 seconds. This indicates that the cause for the delay in launching the application is high application launch time.

Note: HDX Insight also displays additional user metrics, such as WAN jitter and Server Side Retransmits if you are using NetScaler MAS running software 11.1 build 51.21 or later. To view these metrics, navigate to Analytics > HDX Insight > Users, and select a user name. The user metrics appear in the table next to the graph.

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Geo Maps for HDX Insight

The NetScaler MAS geo maps functionality displays the usage of applications across different geographical locations on a map. Administrators can use this information to understand the trends in application usage across various geographical locations.

You can configure NetScaler MAS to display the geo maps for a particular geographical location or LAN by specifying the private IP range (start and end IP address) for the location.

To configure a geo map for data centers

On the Infrastructure tab, navigate to Dashboard and click Data Centers to configure geo maps for a particular location.

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Use Case

Consider a scenario in which organization ABC has 2 branch offices, one in Santa Clara and the other in India.

The Santa Clara users use the NetScaler Gateway appliance at SClara.x.com to access VPN traffic. The Indian users use the NetScaler Gateway appliance at India.x.com to access VPN traffic.

During a particular time-interval, say 10 AM to 5 PM, the users in Santa Clara connect to SClara.x.com to access VPN traffic. Most of the users access the same NetScaler Gateway, causing a delay in connecting to the VPN, so some users connect to India.x.com instead of SClara.x.com.

A NetScaler administrator analyzing the traffic can use the geo map functionality to show the traffic in Santa Clara office. The map shows that the response time in the Santa Clara office is very high, because the Santa Clara office has only one NetScaler Gateway appliance through which users can access VPN traffic. The administrator might therefore decide to install another NetScaler Gateway, so that users have two local NetScaler Gateway appliances through which to access the VPN.

Limitations

If NetScaler instances have Enterprise license, thresholds set on NetScaler MAS for HDX Insight will not be triggered since analytical data is collected for only 1 hour.