----- Original Message ----- From: "Simon Hobson" <[email protected]> To: <[email protected]> Sent: Sunday, December 06, 2009 10:37 AM Subject: Re: [rrd-users] Questions of new user
> [email protected] wrote: > >> > 2. Example: >>> >>> i have --step 300 >>> If i will update often, then 300 sec (for example every 10 seconds) >>> what will be? Which data is stored? >> >>if you update more often than required for you step size, the data will be >>aggregated using the aggregation function you've chosen (MIN, MAX, >>AVERAGE etc) >>so either the smallest or the highest or the average of the values >>will be stored. > > No, the aggregation functions are NOT used for sub-step updates. > > See Alex's tutorial on rates and normalising - it's all explained well > there. > http://www.vandenbogaerdt.nl/rrdtool/ Actually I did not really describe sub-interval updates. And I don't know from the top of my head. I'd have to look in the sources to see what really happens when you do that. I'd probably have step==1, and 300 steps per step in each of {MIN,MAX,AVERAGE} RRAs. That results in one value per five minutes, with aggregation as described above. For the OP: Those tutorials are probably going to help you. Start with "the" tutorial. Experiment a lot. Create a database, update it, fetch the data and see if you can predict what rrdtool is going to show you. HTH Alex _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
