Specifications

Managing Match Rules
Equalizer Installation and Administration Guide 131
structural editing operators. In any list of edit actions, selection refers to the green and red parts
of the match expression and self refers to the red portion.
Some of the structural editing operators include the function you are replacing (for example,
replace with host AND any). When modifying the structure of an any function, it may be
helpful to temporarily change the function to something more distinct (so that you will not have
to interpret the expression, “replace with any AND any”).
8. Click the continue button, Equalizer shows the new version of the match expression.
Depending on the new function, you may have to fill in information in the arg0 and arg1 text
boxes. These fields supply arguments, as required, to the selected match function.
If there are any syntax errors, an error screen appears when you click the continue button. This
most likely occurs if there are missing arguments or syntax errors in the argument strings.
If you click a different part of the match expression without clicking the continue button first,
you will lose any changes since you last clicked continue.
9. You construct complicated Boolean expressions using the structural editing operators.
10. To undo the latest changes, click the undo button.
11. To add to or change the match expression, repeat steps 6 through 10. Equalizer continues to
show your additions and modifications.
12. In the servers section, enable the check boxes to the right of the servers that you want to use to
load balance requests that match the criteria set in the previous steps.
13. Check advanced if you want to override the inheritance of the spoof, once only, abort_server,
or persist flags. The two columns of check boxes to the right of each flag allow you to specify
that the flag setting for a request that is selected by the match rule is either the same as the
cluster setting, or overridden for this match.
Figure60 Flag settings field for match rules
As the tooltip shown in the figure above indicates, the right-hand check box for each flag, if set,
indicates that the flag setting will be inherited from the cluster setting -- in the example above,
the spoof setting will be inherited from the cluster, on which spoof is not set. To override this
setting for this rule, clear the right-hand “inherit” check box, and then enable the left-hand
check box for spoof.
Caution – If you do not enable a check box for at least one server, Equalizer will drop
the connection for any request that matches the rule.