Specifications

Testing Virtual Cluster Configuration
Equalizer Installation and Administration Guide 97
• Enable the hot spare flag. This specifies that any requests refused by all the other servers in
the cluster because they reached their max_conn limit (or are down) will be forwarded to the
hot spare server.
• Enable the dont persist flag. We do not want connections made to the hot spare to persist.
Each connection to the cluster must first be load balanced amongst the other servers in the
cluster and only go to the hot spare if all the other servers have reached their max_conn limit.
The following screen shows an example of adding a server with the above settings:
Testing Virtual Cluster Configuration
1. If you use a two-network configuration: after you have configured a virtual cluster and added
servers, telnet to each of the virtual clusters configured on the Equalizer from a system on the
external network.
When you telnet to a virtual cluster from the external test machine, Equalizer should connect
you to one of the servers configured in the cluster. Repeatedly connect to the same virtual
cluster using several sessions to make sure that Equalizer routes the connections to different
servers in the cluster. (Equalizer does not necessarily select the servers in a round-robin
fashion; it uses the algorithm defined for the cluster to determine the server that gets the next
connection.)
You also can use a client tool such as a Web browser to perform this test.
2. From a client machine on the Internet, connect to each virtual cluster using a Web browser.
For help in resolving configuration problems, see Appendix E, ”Troubleshooting”. Also visit the
Coyote Point Support Portal (
http://www.coyotepoint.com/support.php) for more help.