Novell ZENWORKS LINUX MANAGEMENT 7.2 IR2 - ADMINISTRATION GUIDE 09-25-2008, Руководство администратора

Страница: 381 / 674

Setting Up Preboot Services 381
n
ov
do
cx (e
n)
11
Ju
ly 20
08
u AND v AND w OR x AND y AND z
Filter sets cannot be nested. You can only enter them in series, and the first filter set to match
the device is used to validate using the applied bundle to do preboot work on the device.
Therefore, the order they are listed does not matter. You are simply looking for a match to cause
the bundle to be applied to the device.
TIP: You can easily run a test to see how these logical operators work. Access the Rule
Construction dialog box, click both the Add filter and Add filter set options a few times each to
create a few filter sets, then switch between AND and OR in the Combine filters using field and
observe how the operators change. Click Cancel to exit the Rule Construction dialog box when
you are finished.
You can set up the conditions for a rule by adding all of the filters and filter sets that you need
to identify the type of device you want to match. You typically do not need to set up complex
rules. However, because you can apply multiple rules to a bundle, you can further complicate
the use of logical operators, because each rule is considered to be an OR condition for the
bundle, causing the bundle to be applied if any one of the rules matches the device. Therefore,
keep in mind the OR condition of multiple rules for a bundle when designing your rules.
For example, you could create several rules for the bundle with each rule being a long listing of
AND conditions to be met. Therefore, each rule becomes a specific set of criteria for a device
to meet, causing the bundle to be applied if one is met. Conversely, if you have that same
amount of information in one rule (using filter sets for the AND and OR conditions), it might
make the dialog box so long that it becomes unmanageable.
To determine whether you need one filter set with multiple filters, multiple filter sets with only
one or a few filters per set, multiple filter sets each with multiple filters, or even multiple rules
per bundle, remember that the logical operators for filters within a set are the opposite of the
operators between the sets, and all rules for a bundle use the OR condition.
For example, when selecting the operator in the
Combine filters using field:
Obviously, adding filter sets complicates the use of logical operators, and adding multiple rules
to the bundle further complicates it. Therefore, carefully plan how to place your information
before using this dialog box.
10 To add or remove filters and filter sets, select from the following:
Š Add filter: Adds one filter (a row of fields) after the last filter in this dialog box.
Subsequent clicks of the Add filter option add those filters to the end of the current set,
which is the last listed filter set when there are multiple filters in the set (see Add Filter Set
below). You cannot insert a new filter between existing filters.
Operator
Selected
Within Filter Sets Between Filter Sets Multiple Rules Per Bundle
OR Only one filter in the set
needs to apply to the device
(OR condition). The first
filter that applies is used. Each filter set must have
one filter in it that applies to
the device (AND condition). The first rule that applies is
used (OR condition).
AND All filters within the set must
apply to the device (AND
condition). Only one filter in the set
must apply to the device
(OR condition). The first
filter that applies is used. The first rule that applies is
used (OR condition).