Polling versus Interrupting
Quantellium determines the status of stateful events by periodically polling the device. How often a device is polled is determined by a device’s “Polling interval” setting. The initiative for the query lies with Quantellium.
In contrast, traps and Syslog messages are sent on the initiative of the devices themselves. They cause Quantellium interrupts. The number of interrupts is practicaly unlimited and could cause processing problems. To prevent such potential problems, Quantellium has built-in overload protection for Trap and Syslog interrupts.
These messages are also treated in a slightly different way. Pending and Trap messages are grouped in separate log files per 30 minutes and can be viewed on separate pages. A link to these pages is included on the “Pending events” page.