HP Web Jetadmin - Device Information Polling and Related Features

3
appearing in device data can indicate that credentials are needed. Use the Credentials required
column to determine if HP Web Jetadmin lacks a needed credential. Read the “Security and HP Web
Jetadmin” white paper (found at the Self Help and Documentation tab at www.hp.com/go/wja
) for
more information about device credentials and mechanisms such as the HP Web Jetadmin Credentials
Store.
WJA FEATURE/ACTION VS. DEVICE DETAIL
Data acquisition in HP Web Jetadmin falls into two distinct classes:
• WJA feature/action—HP Web Jetadmin captures information through polling to process a feature
or action. Examples include: alerts triggering, reports data collections, and device list detail.
• Device detail—HP Web Jetadmin develops device detail in a “snapshot” during feature-driven
output such as exporting, reporting, or alerts messaging.
POLLING TYPES
• Background—Ongoing refresh of all device data plus these features: lists, groups, and filters.
• Device list—Supports client devices under view.
• Device tab (single and multi)—Supports Status and Troubleshoot tab actions based on device list
selections.
• Alerts—Queries devices under alerts subscription.
• Supplies—Supports Supplies tab actions based on device list selection.
• Other polling features—Data collections and refresh can also be considered types of polling.
POLL RATE SETTINGS
Each of the three polling mechanisms have
three settings that can be adjusted through
the HP Web Jetadmin menu tree: Tools >
Options > Device Management > Device
Polling (Figure 1). These are:
• Polling interval, measured in seconds,
determines the period of time in which
HP Web Jetadmin can send device
requests to the network.
• Time between polling intervals,
measured in seconds, is an inactive
period when the application does not
send device queries.
• Number of devices per poll is the number of devices that can be queried concurrently. HP Web
Jetadmin places X number of device queries to the network in a poll burst and wait for responses.
It continues to place X device queries each time a burst of queries are satisfied with response
packets, and continues to do this until the polling interval expires.
BACKGROUND POLLING
Background polling is the more sophisticated type of poll mechanism. Here’s why:
• Background polling can run continuously without any client login.
Figure 1—Device Polling setting