AutoPatrol
191
edits
Difference between revisions of "UM:Data Collection"
Jump to navigation
Jump to search
→Threshold Processing
| Line 147: | Line 147: | ||
'''Figure 5: Threshold processing algorithm''' | '''Figure 5: Threshold processing algorithm''' | ||
[[File:Threshold_processing_alg.png||none|alt=Threshold processing algorithm|Threshold processing algorithm]] | |||
As you can see from this flowchart, threshold order is very important. Let's consider the following example: you have DCI representing CPU utilization on the node, and you wish two different events to be generated | |||
As you can see from this flowchart, threshold order is very important. Let's consider the following example: you have DCI representing CPU utilization on the node, and you wish two different events to be generated - one when CPU utilization exceeds 50%, and another one when it exceeds 90%. What happens when you place threshold "> 50" first, and "> 90" second? Table 4 shows values received from host and actions taken by monitoring system (assuming that all thresholds initially unarmed): | |||
'''Table 4: Actions taken by monitoring system''' | '''Table 4: Actions taken by monitoring system''' | ||
| Line 164: | Line 165: | ||
|- | |- | ||
| 55 | | 55 | ||
| When checking first threshold ( | | When checking first threshold ("> 50"), the system will find that it's not active, but condition evaluates to true. So, the system will set threshold state to "active" and generate event associated with it. | ||
|- | |- | ||
| 70 | | 70 | ||
| When checking first threshold ( | | When checking first threshold ("> 50"), the system will find that it's already active, and condition evaluates to true. So, the system will stop threshold checking and will not take any actions. | ||
|- | |- | ||
| 95 | | 95 | ||
| When checking first threshold ( | | When checking first threshold ("> 50"), the system will find that it's already active, and condition evaluates to true. So, the system will stop threshold checking and will not take any actions. | ||
|} | |} | ||
Please note that second threshold actually is not working, because it's | Please note that second threshold actually is not working, because it's "masked" by the first threshold. To achieve desired results, you should place threshold "> 90" first, and threshold "> 50" second. | ||
You can disable threshold ordering by checking '''Always process all thresholds''' checkbox. If it is marked, system will always process all thresholds. | You can disable threshold ordering by checking '''Always process all thresholds''' checkbox. If it is marked, system will always process all thresholds. | ||
==== Threshold Configuration ==== | ==== Threshold Configuration ==== | ||