On 8 Dec 2011, at 00:40, Gregory Sloop wrote: > Provided I understand these configs right, you've got: > > BC> AVERAGE 0.5 1 5040 #1008 > 5040 minutes of 1 min resolution data. (i.e. 84 hours or 3.5 days) > > BC> AVERAGE 0.5 12 21600 #4320 > BC> MIN 0.5 12 21600 #4320 > BC> MAX 0.5 12 21600 #4320 > > Then the next set is 12 minute steps, and you've got 180 days of 12min > data. > > [These compress the prior 1 min steps by a factor or 1:12. > Again, provided I understand correctly. This seems excessive - I'd > probably keep 30 - 90 days of 12 min data. But I'm not sure what your > goals are - perhaps that 12 minute data is more important than I > realize. But I think I should catch most important stuff in 3 days, > and after 30 days, the data's not terribly important for higher > resolution needs.] > > BC> AVERAGE 0.5 144 3600 #720 > BC> MAX 0.5 144 3600 #720 > BC> MIN 0.5 144 3600 #720 > Then 360 days of 144 minute (~2.3 hr resolution) data. > > --- > Here's what I do: > > I keep one minute data too, and I use > BC> AVERAGE 0.5 1 4320 #3 days, 60 sec resolution > > BC> AVERAGE 0.5 10 4320 #30 days at 10 min resolution > BC> MIN 0.5 10 4320 # > BC> MAX 0.5 10 4320 # > [90 days might be better, but I don't often wish for more than 30-60 > days] > > BC> AVERAGE 0.5 144 2400 #400 days at 2 hr resolution > BC> MAX 0.5 144 2400 # > BC> MIN 0.5 144 2400 # > > IIRC, this results in about 8.5MB rrd files for each monitored device. > This seems like a pretty reasonable file size for me. > > I just calculated it, and this appears to use roughly 0.77 KB per row of > data. [~770KB per 1000 RRD rows or ~1300 rows/MB.] > > HTH > > -Greg
Hi Greg, Many thanks for this excellent reply. I can't find documentation that answers this question: If I adjust: *** Database *** step = 60 pings = 20 to different values do I have to adjust the # consfn mrhb steps total lines in step with the adjustments made to the step and pings? Thanks Brian
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