I have a problem I've run into with some statistics I'm trying to gather. I am getting wireless client statistics from all of my access points via SNMP and putting the values into RRD files. All of my values are GAUGE's. Specifically, connection quality (S/N ratio basically) and connection time. I keep one RRD file per client per access point. I create a directory for each client MAC, and in that directory I have an RRD file for each access point the client has shown up on.
The problem I run into is that some clients are connected so sporadically that I rarely get two updates in a row so nothing ever makes it into my RRAs. I can increase the heartbeat to increase the chances that the client will get picked up twice in the same RRD file. That helps, but I do end up with fictional values in the RRA making it appear that the client was connected for a period of time when it wasn't. For the most part, these clients end up with RRD files with recent 'lastupdate' times but no actually data in the RRAs. Optimally, it would be nice if there was some configuration using RRA:LAST or something which would result in the RRA getting populated with a single update. I thought about trying to fudge it by creating the RRD's with an extremely small step size (like 1 second) and always pushing two updates (N:5 -3:5 for example) at once to try and force data into the RRAs. It seems like there should be an easier way though. I'm using version 1.3.1 currently because it's in Debian stable. If newer versions have changed the behavior in a way which helps my situation, I can install a newer version. Thanks in advance, -David Mitchell -- ----------------------------------------------------------------- | David Mitchell ([email protected]) Network Engineer IV | | Tel: (303) 497-1845 National Center for | | FAX: (303) 497-1818 Atmospheric Research | ----------------------------------------------------------------- _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
