HP Web Jetadmin Software Uživatelský manuál stáhnout pdf (Strana 10)

list and for any devices selected by clients. With the Status or Troubleshooting tab enabled,

selected devices are added to this poll mechanism. Data to support either or both of these tabs is

also added to the poll mechanism. When a client logs off or changes the display to some other

area of the software, these items are removed from the Device Tabs poll mechanism. The Device

Tabs poll rate can be adjusted by navigating to Tools > Options > Device Management >

Device Polling > Device Tabs (for more information, see “Poll rate settings” below).

Alerts and Supplies poll mechanisms and adjustment controls within Tools > Options are similar poll

mechanisms developed to support respective features. See HP Web Jetadmin Help for further

information on these items.

Poll rate settings

Each of the three polling mechanisms have three settings that can be adjusted by navigating to Tools

> Options:

 Polling interval setting, measured in seconds, determines the period of time in which HP Web

Jetadmin can send device requests onto the network.

 Time between polling intervals, measured in seconds, is an inactive period during which 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 device queries onto the network in a poll burst and waits for responses. It

continues to place X device queries onto the network each time a burst of queries are satisfied

with response packets, and continues to do this until the polling interval time expires.

Device Management > Status > Multi Device View has the additional setting Maximum number of

devices to show. This restricts the number of devices that can be displayed through device list tabs.

Default poll rate settings

 Background Polling Rates:

 Polling interval = 2 seconds

 Time between polling intervals = 10 seconds

 Maximum devices to poll at a time = 2

 Device List Polling Rates:

 Polling interval = 5 seconds

 Time between polling intervals = 7 seconds

 Maximum devices to poll at a time = 2

 Device Tabs Poll Rates:

 Polling interval = 5 seconds

 Time between polling intervals = 2 seconds

 Maximum devices to poll at a time = 3

Polling example

Consider the following example: Each of three clients has one device selected and also has the Status

tab enabled. The Device Tabs poll mechanism queries for information on all three devices during the

five-second polling interval. After responses are received from all three devices, the poll mechanism

waits for the time between polling intervals (two seconds). If there are more clients with more devices

selected, the Device List Polling mechanism queries three devices. Once responses have been

received from the first three devices, if there is still time remaining in the 5-second polling interval it

queries another three devices. If there is not enough time, the poll mechanism waits for the time

between polling intervals and queries the next three devices during the next polling interval.

Best practices

Devices have to be registered onto

pollers. By default, HP Web Jetadmin

does not poll devices until something

drives that polling, such as when

someone displays a list or status

information. Other ways polling is

initiated include alerts (scheduled)

and automatic groups (such as when

a group looks for certain IP

addresses).

Data collection reporting is its own

polling mechanism.

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