Hello Bobby, > On Jun 5, 2015, at 10:24 AM, Bobby Krupczak <r...@krupczak.org> wrote: > > Does the ONMS architecture take my multiple rows and sum them, merge > them, etc. before saving them to the RRD files? Or, does ONMS only > persist the first entry in the CollectionSet?
ONMS uses an implementation of the CollectionSetVisitor interface called BasePersister to persist the data on RRD/JRB files. The CollectionSet will be persisted as it is, so its content must be correct, otherwise some weirdness may happen on the filesystem structure for the RRD files and the RRD itself. Some time ago, I've modified the JDBCCollector and the WMICollector to be sure that only one instance is created for the "node-level" resource, and reuse it when populating the CollectionSet. Without this change, multiple node-level resources can be created which is theoretically wrong, because a node can only have one node-level resource. That's why it is called node-level ;) Here is the summary of the problem I fixed: http://issues.opennms.org/browse/NMS-5219 Note: the change for the XML Collector was not correct for the solution added to NMS-5219. I fixed that yesterday on NMS-7516 (not merged yet), but basically it follows what I did for JDBC and WMI. I didn't apply the same fix for the XMP Collector because I'm not familiar with it, so I hope you can do it. The rest of the metrics must be considered tabular data (GenericIndexResource). These kind of resources are stored inside a folder. This folder typically contains the name of the resource type. Of course, inside each folder, there are one folder for each resource that must be unique. Finally, inside each resource folder, you'll see the JRB/RRD files for the metrics. The structure of the JRB/RRD depends on the storeByGroup variable. Hope that helps. Thanks, Alejandro.
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