op5 Monitor is using PNP to create the graphs available for most standard services in the user interface.PNP is an add-on to nagios which analyzes performance data provided by plugins and stores them automatically into RRD-databases (Round Robin Databases).PNP only processes performance data built according to the Developer Guidelines for nagios plugins. With this limitation we want to honour the work of Nagios Plugin Developers who stick to the guidelines.Kudos to Joerg Linge for letting us use his text.This file will be overwritten during updates of PNP as the paths and options are detected during ./configure.If this file does not exist the file config.php can be taken as a guideline.Collections provides the opportunity to collect graphs of different hosts and services on to one page. That way - as an example - you can display the traffic rates of all tape libraries.There are two ways to select which services to show in the graph, either use the GUI to select the services from the list or use regular expressions.Enter a collection name and select wich services to put in the collection by selecting them from the list.In the example below we select all graphs from the host which names starts with “switch” and services that contains “Interface” and “Traffic”. Note that regular expressions are case sensitive.The collections are found under graphs in the main menu on the left and click on the Collection iconA combined graph overlays several graphs in the same graph which will give a better overview of how two different checks are performing.It takes one or more serives from one or more host and layes them on top of each other in the same graph.
The service checks must have the same name on all the hosts for combined graphs to work.Select the service to graph and from which hosts this service should be fetched from. Also add a name and comment.Click on Saveand under Combined Graphs