HP Web Jetadmin Software Manuel d'utilisateur Page 86

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1. Go to Tools > Options > Application Management > User Security.
2. Click the Restore button.
Device Management Conguration Options
The following sections describe the conguration options for functional areas in the Device Management view. To
access these conguration options, go to Tools > Options > Device Management.
Device Polling Conguration Options
There are several conguration options that can be set to aect how device polling is performed in
HP Web Jetadmin.
Congure the Background Polling Options
Whenever you access a device list in HP Web Jetadmin, the devices on the network are polled. You can determine
how many devices and how often devices are polled by setting the rate on the Background polling page. You can
reduce network trac by setting a polling rate appropriate for your own environment.
HP Web Jetadmin performs a slow-poll when users access device lists. Slow polling means that
HP Web Jetadmin queries only a certain number of devices every X seconds and only for specied columns. The
columns polled are based on the union of all columns in the layouts currently displayed on Device List pages on
all currently connected clients. This polling rate can be changed through Tools > Options > Device Management >
Device Polling > Device List. List performance can be improved by changing the polling rate; network trac will
increase.
TIP: Another way to refresh the list more quickly is to highlight any or all devices where fast data is desired.
Selected devices in the currently visible portion of the device list are always polled at a faster rate than non-
selected devices.
Polling always occurs across all devices at the specied rate regardless of whether or not anyone is accessing a
device list. Accessing a device list only aects the columns which are polled for when the polling does occur.
Selecting devices within the visible portion of the list causes those devices to be polled for at a higher rate.
Polling is also aected by thresholds that specify how long the value for a specic column is considered valid.
These thresholds are predened in HP Web Jetadmin. You cannot change the predened thresholds. Before
HP Web Jetadmin polls a device for column values, it performs the following steps:
1. If HP Web Jetadmin does not have a value for a column, it polls the device. If HP Web Jetadmin can obtain a
value from the device, it displays the value in the device lists.
2. If HP Web Jetadmin cannot obtain a value from the device, it checks the age of the value it has. If the age of
the value is within the predened threshold for the column, HP Web Jetadmin considers the value valid.
3. If the age of the value exceeds the predened threshold for the column, HP Web Jetadmin polls the device
to obtain the current value. If HP Web Jetadmin can obtain a value from the device, it displays the value in
the device lists. If HP Web Jetadmin cannot obtain a value from the device, it displays <Unknown> in the
device lists.
The predened thresholds are based on the stability of the value for each column. For example, the Severity
column is considered out-of-date after 15 seconds because the status of devices changes frequently. The
60 Chapter 2 Introduction to HP Web Jetadmin ENWW
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