Appendix F: Equalizer VLB
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Equalizer Installation and Administration Guide
Equalizer VLB Basic
Equalizer VLB Basic uses VMware’s management API to retrieve real-time virtual server performance information
from a VMware vCenter console that manages virtual machines running on ESX Server (or from a single ESX
Server directly). The additional server availability and resource utilization information obtained from VMware
allows Coyote Point’s Equalizer™ traffic management appliance to more efficiently direct the traffic flowing to
VMware virtual machines. The diagram below illustrates how Equalizer VLB works:
Equalizer extracts information from VMware using the VMware API and load balances requests across virtual
machines using knowledge of what is going on inside each virtual machine. If there is only one ESX Server in your
configuration, Equalizer can also be set up to communicate directly with the ESX Server (instead of VSphere or
vCenter), and load balance among the virtual machines defined on that ESX Server only.
Equalizer uses statistics such as the amount of memory in use by a virtual machine, the amount of memory in use by
all virtual machines on the physical host, and CPU utilization to automatically distribute incoming cluster requests to
the virtual machines added to the cluster. Response to changes in VMware configuration is dynamic. If the virtual
server performance in the pool is uneven, Equalizer automatically detects the uneven latency and sends new traffic
to the best available virtual machine. If a server is overloaded and reboots, Equalizer simply detects that the server is
available again, and automatically resumes sending traffic to it.
Using VLB Basic
Typically, VLB is used in the following manner:
1. Provide VMware login information and enable VLB on the global
VLB
tab.
2. For each cluster that contains (or will contain) servers that are VMware Virtual Machines:
a.
Enable VLB agents on the cluster
Probe
tab.
Summary of Contents for E350GX
Page 18: ...Chapter Preface 18 Equalizer Installation and Administration Guide ...
Page 38: ...Chapter 1 Equalizer Overview 38 Equalizer Installation and Administration Guide ...
Page 80: ...Chapter 4 Equalizer Network Configuration 80 Equalizer Installation and Administration Guide ...
Page 110: ...Chapter 5 Configuring Equalizer Operation 110 Equalizer Installation and Administration Guide ...
Page 208: ...Chapter 7 Monitoring Equalizer Operation 208 Equalizer Installation and Administration Guide ...
Page 240: ...Chapter 8 Using Match Rules 238 Equalizer Installation and Administration Guide ...
Page 262: ...Appendix A Server Agent Probes 258 Equalizer Installation and Administration Guide ...
Page 274: ...Appendix B Timeout Configuration 270 Equalizer Installation and Administration Guide ...
Page 280: ...Appendix D Regular Expression Format 276 Equalizer Installation and Administration Guide ...
Page 310: ...Appendix F Equalizer VLB 306 Equalizer Installation and Administration Guide ...
Page 318: ...Appendix G Troubleshooting 314 Equalizer Installation and Administration Guide ...