RRDTUNE(1) rrdtool RRDTUNE(1) (NAME) rrdtune - Round Robin (SYNOPSIS) rrdtool tune filename [--heartbeat|-h ds-name:heartbeat] [--minimum|-i ds-name:min] [--maximum|-a ds-name:max] [--data-source-type|-d ds-name:DST] [--data-source-rename|-r old-name:new-name] [--deltapos|-p scale-value] [--deltaneg|-n scale-value] [--failure-threshold|-f failure-threshold] [--window-length|-w window-length] [--alpha|-x adaption-parameter] [--beta|-y adaption-parameter] [--gamma|-z adaption-parameter] [--gamma-deviation|-v adaption-parameter] [--smoothing-window|-s fraction-of-season] [--smoothing-window-deviation|-S fraction-of-season] [--aberrant-reset|-b ds-name] [--step|-t newstep] [--daemon|-D address] [DEL:ds-name] [DS:ds-spec] [DELRRA:index] [RRA:rra-spec] [RRA#index:[+-=] (DESCRIPTION) tune Round Robin (RRD) . tune RRD . RRD . tune COMPUTE . min max heartbeat COMPUTE DST COMPUTE RRD . tune RRA (aberrant behavior) . (DS) round-robin ( RRA) . (in-place) RRD . . --source --template create RRD <<>> . filename RRD (tune) . --heartbeat|-h ds-name:heartbeat heartbeat . RRD . --minimum|-i ds-name:min . min 'U' . --maximum|-a ds-name:max . max 'U' . --data-source-type|-d ds-name:DST (DST). --data-source-rename|-r old-name:new-name . --deltapos|-p scale-value (confidence band) RRA FAILURES . 2 . CDEF . RRA FAILURES . --deltaneg|-n scale-value RRA FAILURES . 2 . --deltapos . --failure-threshold|-f failure-threshold RRA FAILURES (failure) . (window length) RRA FAILURES . tune failure-threshold window-length . 0 . --window-length|-w window-length . RRA FAILURES 28 . 0 . --alpha|-x adaption-parameter (intercept) Holt-Winters. 0 1 . --beta|-y adaption-parameter (slope) Holt-Winters. 0 1 . --gamma|-z adaption-parameter RRA SEASONAL. 0 1 . --gamma-deviation|-v adaption-parameter RRA DEVSEASONAL. 0 1 . --smoothing-window|-s fraction-of-season RRA SEASONAL. 0 1 . --smoothing-window-deviation|-S fraction-of-season RRA DEVSEASONAL. 0 1 . --aberrant-reset|-b ds-name . RRA HWPREDICT MHWPREDICT (unknown) . RRA SEASONAL . RRA DEVSEASONAL . RRA FAILURES . ( RRA HWPREDICT MHWPREDICT) ( RRA DEVPREDICT) ( RRA FAILURES) . RRA . RRD . SEASONAL DEVSEASONAL . (bootstrap) . . . . . --step|-t newstep (step size) RRD newstep . TODO: --daemon|-D address : -d ( 'd') ( ) 'D' . RRDtool rrdcached address . filename / (flush) . filename . DS RRA RRD ( : RRD ). : . -l rrdcached . DEL:ds-name DEL . RRD . DEL . DS:ds-spec ( create ) RRD . DS . DELRRA:index RRA index . RRA 0 . RRA:rra-spec ( create ) RRA RRD . RRA . RRA#index:[+-=] RRA / . RRA 0 . (EXAMPLE 1) "rrdtool tune data.rrd -h in:100000 -h out:100000 -h through:100000" heartbeat 'in' 'out' 'through' data.rrd 100'000 ( ) . MRTG-2.0 RRDtool *UNKNOWN* . (EXAMPLE 2) "rrdtool tune monitor.rrd --window-length 5 --failure-threshold 3" RRA FAILURES window-length 9 failure-threshold 7 . . (EXAMPLE 3) "rrdtool tune some.rrd DEL:a RRA#0:+10" a . RRD RRD . (in-place) . (AUTHORS) Tobias Oetiker , Peter Stamfest 1.11.0 2026-08-08 RRDTUNE(1)