[rrd-users] RRD DS;heartbeat and MRTG

Chris Josephes cjoseph at mr.net
Mon Oct 11 17:21:16 MEST 1999

It looks like the test rrd file I created is working now with the higher
heartbeat setting.  Now I just need to update the other files so they will
work with a larger MRTG Interval.

I looked over some of the MRTG source code again and I thought some
of the RRA definitions looked somewhat excessive.

          RRDs::create($rrd, '-b', $now, '-s', 300,

Given a five minute interval, we're keeping 600 1 interval avgs/maxs, 600
6 interval avgs/maxs, 600 24 interval avgs,maxs, and 732 288 interval

Wouldn't it be better to specify the RRAs like this...

	RRA:AVERAGE:0.5:1:288	(daily, 5 minute average)
	RRA:AVERAGE:0.5:12:168  (weekly, 1 hour average)
	RRA:AVERAGE:0.5:24:360  (monthly, 2 hour average)
        RRA:AVERAGE:0.5:288:365 (yearly, 1 day average)
        RRA:MAX:0.5:1:288   (daily, 5 minute maximum)
        RRA:MAX:0.5:12:168  (weekly, 1 hour maximum)
        RRA:MAX:0.5:24:360  (monthly, 2 hour maximum)
        RRA:MAX:0.5:288:365 (yearly, 1 day maximum)

I would think that this would make the RRD files smaller, and it would
still give us enough information to make the usual MRTG graphs.

--                      _______________
 Chris Josephes      __/ MRNet/Onvoy   \
 chrisj at mr.net    __/   www.onvoy.com  /

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