Set Update Periods Help

To display the Set Update Periods dialog box (available to users with root permissions only), select the ServerNet Manager Actions menu, and then the Set update periods menu item.

Overview

The information displayed by the ServerNet Manager views for each node is maintained in a Management Information Base (MIB) by the ServerNet Agent. The agent retrieves ServerNet SAN and ServerNet PCI Adapter (SPA) state, status, register content, and various statistical information from the SPA driver (SPAD) on each node. This retrieval process is repeated for all nodes on a regular (but tunable) periodic basis, which is referred to as the agent update period.

Note: The agent also is responsible for notifying the ServerNet Manager of asynchronous events that occur on the ServerNet SAN or SPA, such as when a path fails (becomes disabled). These asynchronous events are reported when the manager polls the agent.

The ServerNet Manager update period is the amount of time between successive requests to the agent for the ServerNet SAN/SPA information. The manager update period must be equal to or greater than the agent update period to guarantee that the data from the agent has been updated since the last request (poll) by the manager.


Setting the Manager and Agent Update Periods

As the Set Update Periods dialog box indicates, a pair of sliders is used to set the manager and agent update periods in seconds. The range of update periods is shown on the slider bar. To change either update period, drag the appropriate slider to the desired value.

Manager Update Period Slider
The manager update period can be set to any value equal to or greater than the agent update period. If you attempt to drag the manager slider to a value less than the agent setting, the agent slider is moved along with the manger slider

Agent Update Period Slider
The agent update period can be set to any value equal to or less than the manger update period. If you attempt to drag the agent slider to a value greater than the manager setting, the manager slider is moved along with the agent slider.

Cancel Button
Select Cancel to cancel any changes that have been made to either update period value and exit the Set Update Periods dialog box without affecting the current update period settings.

Revert Button
Select Revert to revert to the update period values that were in effect when the Set Update Periods dialog box was displayed.

OK Button
Select OK to make the update period values that are set on the sliders take effect for the manager and agent. The agent update period is saved so it persists across ServerNet Manager sessions. If other ServerNet Manager sessions are underway, the saved agent update period affects them too. The manager update period is saved so it persists across ServerNet Manager sessions if the This Session Only checkbox is not checked.