Using the Traffic History Pages

The traffic history pages are useful for viewing recent activity across your web server system. They enable you to view graphs of the traffic over the last week or 24 hour period.

You can view traffic history in the following ways:

• Traffic Overview enables you to view the total traffic on specified web

servers on different machines, Virtual Servers or Subservers (as described in Using the Traffic Overview Page on page 79).

• Web Site Comparison enables you to compare the traffic on your busiest

web sites by Virtual Server or host header (as described in Using the Web

Site Comparison Page on page 80).

• Cluster Traffic Analysis enables you to compare the traffic on the web

servers on different machines in your cluster20 (as described in Using the

Cluster Traffic Analysis Page on page 81).

Note:

i

You can only view the traffic history for Virtual Servers that have the statistics gathering functionality enabled (it is by default). For further information, see

Traffic History Statistics Gathering on page 176.

Using the Traffic Overview Page

Use the Traffic Overview page to view the total traffic on specified web servers on different machines, Virtual Servers or host headers. Access the page by clicking the Traffic Overview link in the Web Controller menu. The page displays a graph of total traffic in either hits per minute or bytes per second over the last week or 24 hour period. The total is calculated by adding together the traffic on the specified web servers, Virtual Servers or host headers.

1) Specify what information to plot, in the following way:

• Select whether you want to view the total traffic on all web servers on all machines in your cluster, or just one of them. If you only want

20. A machine in a cluster may be running more than one web server. If this is the case then the web server is listed using a machine_name:port format. If there is just one web server on a machine then the web server is simply listed by machine name.

to see traffic for one web server on a machine, select it in the drop down list.

• Select whether you want to view the total traffic on all running Vir- tual Servers, or just one of them. If you only want to see traffic for one Virtual Server, select it in the drop down list.

• Select whether you want to view the total traffic on all host head- ers21, or just one of them. If you only want to see traffic for one host header, click the This host header radio button, then enter the host header name. If you selected an individual Virtual Server in the previ- ous step, the host header you enter must be running on that Virtual Server, otherwise no results will be displayed.

2) Specify how the traffic overview should be displayed, as follows: • Specify whether to view hits per minute or bytes per second, by

selecting either from the drop down list.

• Specify whether to view statistics for the previous 24 hours, or previ- ous week, by selecting the value from the drop down list.

3) Click the Plot button for the changes to take effect.

Using the Web Site Comparison Page

Use the Web Site Comparison page to compare the traffic on your busiest web sites. Access the page by clicking the Web Site Comparison link in the Web Controller menu.

The page displays a graph of traffic on your busiest web sites (by Virtual Server or host headers), using a different colored line for each of them. The traffic can be displayed in either hits per minute or bytes per second over the last week or 24 hour period.

21. The Host Header field is used in HTTP/1.1 (and above) to specify the host name and port number (if not using the default port) of the resource being requested. The browser fills the

The page can also display a “five minute snapshot”, enabling you to compare the most recent traffic on your busiest host headers.

1) Select which information to plot, in the following way:

• If you have a cluster of multiple web servers on different machines, select which web server you want to view traffic for. To do this, select the web server in the drop down list.

• If you want to compare your busiest Virtual Servers, select how many to view on the graph. Note that if a Virtual Server has had no traffic, it will not appear in the graph.

• If you want to compare your busiest host headers, select how many to view on the graph. You can choose to view just the busiest host headers on a specified Virtual Server, or the busiest host headers across all Virtual Servers.

• If you want to view the five minute snapshot, click the appropriate radio button. You can choose to view the snapshot for only the busi- est host headers on a specified Virtual Server, or for the busiest host headers across all Virtual Servers.

2) Select how the graph of traffic should be displayed, as follows: a) Specify whether to view hits per minute or bytes per second, by

selecting either from the drop down list.

b) Specify whether to view statistics for the previous 24 hours, or previ- ous week, by selecting the value from the drop down list.

3) Click the Plot button for the changes to take effect.

Using the Cluster Traffic Analysis Page

Use the cluster traffic analysis page to compare traffic on the web servers on different machines in your cluster20. Access the page by clicking the Cluster

Traffic Analysis link in the Web Controller menu.

The page displays a graph of traffic on the web servers on different machines in your cluster, using a different colored line for each. The traffic can be displayed as either hits per minute or bytes per second, over the last week or 24 hour period.

Below the graph, all the web servers in the cluster are listed. Clicking the name of a web server in this list takes you to the Traffic Overview page, and displays the total traffic for the web server on this machine.

1) Select how the graph of traffic should be displayed, as follows: • Specify whether to view hits per minute or bytes per second, by

selecting either from the drop down list.

• Specify whether to view statistics for the previous 24 hours, or previ- ous week, by selecting the value from the drop down list.

2) Click the Plot button for the changes to take effect.