RRDTUNE(1)                          rrdtool                         RRDTUNE(1)



NNAAMMEE
       rrdtune - Modify some basic properties of a Round Robin Database

SSYYNNOOPPSSIISS
       rrrrddttooooll ttuunnee _f_i_l_e_n_a_m_e [----hheeaarrttbbeeaatt|--hh _d_s_-_n_a_m_e:_h_e_a_r_t_b_e_a_t] [----mmiinnii--
       mmuumm|--ii _d_s_-_n_a_m_e:_m_i_n] [----mmaaxxiimmuumm|--aa _d_s_-_n_a_m_e:_m_a_x]
       [----ddaattaa--ssoouurrccee--ttyyppee|--dd _d_s_-_n_a_m_e:_D_S_T] [----ddaattaa--ssoouurrccee--rreennaammee|--rr _o_l_d_-
       _n_a_m_e:_n_e_w_-_n_a_m_e] [----ddeellttaappooss _s_c_a_l_e_-_v_a_l_u_e] [----ddeellttaanneegg _s_c_a_l_e_-_v_a_l_u_e]
       [----ffaaiilluurree--tthhrreesshhoolldd _f_a_i_l_u_r_e_-_t_h_r_e_s_h_o_l_d] [----wwiinnddooww--lleennggtthh _w_i_n_d_o_w_-_l_e_n_g_t_h]
       [----aallpphhaa _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r] [----bbeettaa _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r] [----ggaammmmaa _a_d_a_p_-
       _t_i_o_n_-_p_a_r_a_m_e_t_e_r] [----ggaammmmaa--ddeevviiaattiioonn _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r] [----aabbeerr--
       rraanntt--rreesseett _d_s_-_n_a_m_e]

DDEESSCCRRIIPPTTIIOONN
       The tune option allows you to alter some of the basic configuration
       values stored in the header area of a Round Robin Database (RRRRDD).

       One application of the ttuunnee function is to relax the validation rules
       on an RRRRDD. This allows to fill a new RRRRDD with data available in larger
       intervals than what you would normally want to permit. Be very careful
       with tune operations for COMPUTE data sources.  Setting the _m_i_n, _m_a_x,
       and  _h_e_a_r_t_b_e_a_t for a COMPUTE data source without changing the data
       source type to a non-COMPUTE DDSSTT WILL corrupt the data source header in
       the RRRRDD.

       A second application of the ttuunnee function is to set or alter parameters
       used by the specialized function RRRRAAss for aberrant behavior detection.

       _f_i_l_e_n_a_m_e
               The name of the RRRRDD you want to tune.

       ----hheeaarrttbbeeaatt|--hh _d_s_-_n_a_m_e:_h_e_a_r_t_b_e_a_t
               modify the _h_e_a_r_t_b_e_a_t of a data source. By setting this to a
               high value the RRD will accept things like one value per day.

       ----mmiinniimmuumm|--ii _d_s_-_n_a_m_e:_m_i_n
               alter the minimum value acceptable as input from the data
               source.  Setting _m_i_n to 'U' will disable this limit.

       ----mmaaxxiimmuumm|--aa _d_s_-_n_a_m_e:_m_a_x
               alter the maximum value acceptable as input from the data
               source.  Setting _m_a_x to 'U' will disable this limit.

       ----ddaattaa--ssoouurrccee--ttyyppee|--dd _d_s_-_n_a_m_e:_D_S_T
               alter the type DDSSTT of a data source.

       ----ddaattaa--ssoouurrccee--rreennaammee|--rr _o_l_d_-_n_a_m_e:_n_e_w_-_n_a_m_e
               rename a data source.

       ----ddeellttaappooss _s_c_a_l_e_-_v_a_l_u_e
               Alter the deviation scaling factor for the upper bound of the
               confidence band used internally to calculate violations for the
               FAILURES RRRRAA. The default value is 2. Note that this parameter
               is not related to graphing confidence bounds which must be
               specified as a CDEF argument to generate a graph with confi-
               dence bounds. The graph scale factor need not to agree with the
               value used internally by the FAILURES RRRRAA.

       ----ddeellttaanneegg _s_c_a_l_e_-_v_a_l_u_e
               Alter the deviation scaling factor for the lower bound of the
               confidence band used internally to calculate violations for the
               FAILURES RRRRAA. The default value is 2. As with ----ddeellttaappooss, this
               argument is unrelated to the scale factor chosen when graphing
               confidence bounds.

       ----ffaaiilluurree--tthhrreesshhoolldd _f_a_i_l_u_r_e_-_t_h_r_e_s_h_o_l_d
               Alter the number of confidence bound violations that constitute
               a failure for purposes of the FAILURES RRRRAA. This must be an
               integer less than or equal to the window length of the FAILURES
               RRRRAA. This restriction is not verified by the tune option, so
               one can reset failure-threshold and window-length simultane-
               ously. Setting this option will reset the count of violations
               to 0.

       ----wwiinnddooww--lleennggtthh _w_i_n_d_o_w_-_l_e_n_g_t_h
               Alter the number of time points in the temporal window for
               determining failures. This must be an integer greater than or
               equal to the window length of the FAILURES RRRRAA and less than or
               equal to 28. Setting this option will reset the count of viola-
               tions to 0.

       ----aallpphhaa _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r
               Alter the intercept adaptation parameter for the Holt-Winters
               forecasting algorithm. This parameter must be between 0 and 1.

       ----bbeettaa _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r
               Alter the slope adaptation parameter for the Holt-Winters fore-
               casting algorithm. This parameter must be between 0 and 1.

       ----ggaammmmaa _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r
               Alter the seasonal coefficient adaptation parameter for the
               SEASONAL RRRRAA. This parameter must be between 0 and 1.

       ----ggaammmmaa--ddeevviiaattiioonn _a_d_a_p_t_i_o_n_-_p_a_r_a_m_e_t_e_r
               Alter the seasonal deviation adaptation parameter for the
               DEVSEASONAL RRRRAA. This parameter must be between 0 and 1.

       ----aabbeerrrraanntt--rreesseett _d_s_-_n_a_m_e
               This option causes the aberrant behavior detection algorithm to
               reset for the specified data source; that is, forget all it is
               has learnt so far.  Specifically, for the HWPREDICT RRRRAA, it
               sets the intercept and slope coefficients to unknown. For the
               SEASONAL RRRRAA, it sets all seasonal coefficients to unknown. For
               the DEVSEASONAL RRRRAA, it sets all seasonal deviation coeffi-
               cients to unknown. For the FAILURES RRRRAA, it erases the viola-
               tion history. Note that reset does not erase past predictions
               (the values of the HWPREDICT RRRRAA), predicted deviations (the
               values of the DEVPREDICT RRRRAA), or failure history (the values
               of the FAILURES RRRRAA).  This option will function even if not
               all the listed RRRRAAss are present.

               Due to the implementation of this option, there is an indirect
               impact on other data sources in the RRD. A smoothing algorithm
               is applied to SEASONAL and DEVSEASONAL values on a periodic
               basis. During bootstrap initialization this smoothing is
               deferred. For efficiency, the implementation of smoothing is
               not data source specific. This means that utilizing reset for
               one data source will delay running the smoothing algorithm for
               all data sources in the file. This is unlikely to have serious
               consequences, unless the data being collected for the non-reset
               data sources is unusually volatile during the reinitialization
               period of the reset data source.

               Use of this tuning option is advised when the behavior of the
               data source time series changes in a drastic and permanent man-
               ner.

EEXXAAMMPPLLEE 11
       "rrdtool tune data.rrd -h in:100000 -h out:100000 -h through:100000"

       Set the minimum required heartbeat for data sources 'in', 'out' and
       'through' to 10'000 seconds which is a little over one day in data.rrd.
       This would allow to feed old data from MRTG-2.0 right into RRDtool
       without generating *UNKNOWN* entries.

EEXXAAMMPPLLEE 22
       "rrdtool tune monitor.rrd --window-length 5 --failure-threshold 3"

       If the FAILURES RRRRAA is implicitly created, the default window-length is
       9 and the default failure-threshold is 7. This command now defines a
       failure as 3 or more violations in a temporal window of 5 time points.

AAUUTTHHOORR
       Tobias Oetiker <tobi@oetiker.ch>



1.2.30                            2009-01-19                        RRDTUNE(1)
