Coyote Point Systems E350GX, Installation And Administration Manual

Page: 113 / 344

Working with Virtual Clusters
Equalizer Installation and Administration Guide 113
L4 UDP clusters are appropriate for connectionless (stateless) applications, such as DNS, TFTP, Voice over
IP (VoIP), and streaming applications -- any application that exchanges short packets with many clients,
and where dropped packets are preferred to delayed packets (i.e., the highest possible network performance
is required).
• In Layer 7 HTTP and HTTPS clusters, Equalizer routes requests to particular servers based on configured
load balancing criteria, the IP address, the port, and the content of the request . Because Equalizer examines
the request content, load balancing decisions can be made based on application specific criteria through the
use of Match Rules.
Also note that in HTTPS clusters, Equalizer accepts HTTPS connections from clients, performs all the SSL
operations necessary to examine the request, and sends the request on to a server in the cluster using HTTP.
This offloads resource-intensive SSL operations from the server to Equalizer, improving overall server and
cluster performance.
3. Determine the
load balancing policy
(
round robin
,
static weight
,
adaptive
,
fastest response
,
least
connections
, or
server agent
) that the Equalizer will use to decide how to route incoming requests to the
servers in the cluster.
4. Determine the additional settings and flags to be used on the cluster and its servers. For most options, start with
the defaults and make incremental changes as you examine traffic passing through your clusters.
Adding a Layer 7 Virtual Cluster
To add a new virtual cluster, follow these steps:
1. Log into the Administrative Interface using a login that has add/del access for global parameters (see “Logging
In” on page 52).
2. Right click on
Equalizer
(or the configure Failover Peer Name for this Equalizer) at the top of the left frame,
and select
Add Cluster
from the menu that appears. The
Add New Cluster
dialog appears.
3. Select
Layer 7 HTTP
or
Layer 7 HTTPS
and then click the
Next
icon .
4. Enter the following information:
Click the
Next
icon .
5. A confirmation screen appears; click commit to create the cluster with the parameters shown.
6. The
Configuration
tab for the new cluster is opened. See the following section for an explanation of the Layer 7
cluster configuration tabs and parameters.
Cluster Name
The logical name for the cluster, or accept Equalizer’s default. Each
cluster must have a unique name that begins with an alphabetical
character (for example,
CPImages1) . The cluster name is limited to 63
characters.
Cluster IP Address
Enter the ip address , which is the dotted decimal IP address of the
cluster. The IP address of the cluster is the external address (for
example,
199.146.85.0
) with which clients connect to the cluster.
Cluster Port
For HTTP and HTTPS protocol clusters, enter the port: the numeric port
number on the Equalizer to be used for traffic between the clients and
the cluster. For HTTP clusters, the cluster port defaults to 80. For HTTPS
clusters, the cluster port defaults to 443.