I currently run an application called OpenNMS. This is a free enterprise grade NMS. Its current framework uses RRDs to collect performance/node level data such as cpu load via snmp. all data is stored in these RRDs. I was wondering if anyone out there has had a chance or a need to move the data in the RRDs to MySQL or some other relational database such as postgresql, etc.
No, I never have for that specific purpose. But I have used RRDtool for a while, and used it to extract data for other purposes (such as formatting it to compile reports, generating graphs, etc.).