Coyote Point Systems E350GX, Installation And Administration Manual

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Example Match Rules
Equalizer Installation and Administration Guide 229
Changing Persistence Settings Using Match Rules
By default, a client request that matches a match rule expression is load balanced using the same load balancing
parameters and options that are currently set on the cluster. This section shows you how to change load balancing
parameters and flags in a match rule.
For example, persistent connections to servers are enabled by the
persist
cluster flag, which is enabled by default
when you create a cluster. While you could select the
dont persist
option for a server, this means that all
connections to that server will not be persistent. Let’s assume that you only want to disable persistence for incoming
requests that have a URI containing a hostname in the following format:
xxx .testexample.com
We’ll use the
host_suffix()
match rule function to test for the above hostname format. For this example, we
assume that a cluster with three servers ( sv00 , sv01 , sv02 ) has already been defined. We will construct a match rule
that turn off persist for any request that contains the host suffix “ testexample.com ”; this request will be balanced
across all three servers in the cluster.
1. Log into the Administrative Interface using a login that has
add/del
access for the cluster (see “Logging In” on
page 52).
2. In the left frame, right-click the name of the Layer 7 cluster to which you want to add the rule, and select
Add
Match Rule
. The
Add Match Rule
dialog appears:
a. Type
nopersist
into the
match name
text box.
b. Select all the servers in the
servers
list using the Ctrl or Shift key and the left mouse button
c. Select
commit
.
The match rule is created, added to the object tree, and its
Configuration
tab is opened, as shown on the
following page:
3. In the
expression
field, select
any()
to open the
Select function
dialog:
a. Select
replace with host_suffix
from the drop-down box.