Specifications

Plotting Geographic Cluster Performance History
Equalizer Installation and Administration Guide 111
1. Log into the Equalizer Administration Interface in either view or edit mode.
2. In the left frame, click the name of the geographic cluster whose parameters you want to view.
The Geographic Cluster Parameters screen appears in the right frame.
This page contains the following information:
• Geographic Cluster, which is the name of the cluster.
• DNS TTL, which is the amount of time, in seconds, that a name server is allowed to cache the
domain information.
• MX Exchanger, which is the fully-qualified domain name that Equalizer will return if
Equalizer receives a “mail exchanger” request for this geographic cluster. The mail exchanger
is the host responsible for handling email sent to users in the domain.
• Load Balancing Method indicates the load-balancing method: round trip, adaptive, site load,
or site weight. (For descriptions of these methods, refer to “Configuring a Geographic
Cluster’s Load-Balancing Options” on page 156.)
• Load Balancing Response shows the type of response: slowest, slow, medium, fast, or
fastest. This value controls how aggressively Equalizer adjusts the site’s dynamic weights.
(For more information about the response settings, refer to “Adding a Geographic Cluster” on
page 155.)
• ICMP Triangulation shows whether you have enabled ICMP triangulation, which routes
client requests to the closest site geographically.
Plotting Geographic Cluster Performance History
If you have installed Envoy for your Equalizer, you can use the Plot Geographic Cluster feature to
view a graphical representation of the performance history for the selected geographic cluster.
You can plot four values for a geographic cluster:
• Request Rate shows the number of requests received for the cluster per minute.
• Active Requests displays the number of requests that Equalizer is in the process of routing.
• Network Latency displays the average triangulation time when at least one site was able to
respond. (This value does not include clients for which the default site was selected.)
• Site Summary shows the number of requests directed to all sites in the cluster for the
specified duration. This plot appears by default when the plot site page is opened.
To plot the performance history for a geographic cluster, follow these steps:
1. Log into the Equalizer Administration Interface in either view or edit mode.
2. In the left frame, click the name of the geographic cluster whose history you want to view. The
Geographic Cluster Parameters appear in the right frame.
Note – You can only display the site summary separately; you cannot plot the site summary on
the same graph as the other values.