1RRDTUNE(1) rrdtool RRDTUNE(1)
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6 rrdtune - Modify some basic properties of a Round Robin Database
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9 rrdtool tune filename [--heartbeat|-h ds-name:heartbeat]
10 [--minimum|-i ds-name:min] [--maximum|-a ds-name:max]
11 [--data-source-type|-d ds-name:DST] [--data-source-rename|-r old-
12 name:new-name] [--deltapos|-p scale-value] [--deltaneg|-n scale-value]
13 [--failure-threshold|-f failure-threshold] [--window-length|-w window-
14 length] [--alpha|-x adaption-parameter] [--beta|-y adaption-parameter]
15 [--gamma|-z adaption-parameter] [--gamma-deviation|-v adaption-
16 parameter] [--smoothing-window|-s fraction-of-season]
17 [--smoothing-window-deviation|-S fraction-of-season]
18 [--aberrant-reset|-b ds-name] [--step|-t newstep] [--daemon|-D address]
19 [DEL:ds-name] [DS:ds-spec] [DELRRA:index] [RRA:rra-spec]
20 [RRA#index:[+-=]<number]>
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23 The tune option allows you to alter some of the basic configuration
24 values stored in the header area of a Round Robin Database (RRD).
25 One application of the tune function is to relax the validation rules
27 on an RRD. This allows you to fill a new RRD with data available in
28 larger intervals than what you would normally want to permit. Be very
29 careful with tune operations for COMPUTE data sources. Setting the
30 min, max, and heartbeat for a COMPUTE data source without changing the
31 data source type to a non-COMPUTE DST WILL corrupt the data source
32 header in the RRD.
33 A second application of the tune function is to set or alter parameters
35 used by the specialized function RRAs for aberrant behavior detection.
36 Still another application is to add or remove data sources (DS) or add
38 / remove or alter some aspects of round-robin archives (RRA). These
39 operations are not really done in-place, but rather generate a new RRD
40 file internally and move it over the original file. Data is kept intact
41 during these operations. For even more in-depth modifications you may
42 review the --source and --template options of the create function which
43 allow you to combine multiple RRD files into a new one and which is
44 even more clever in what data it is able to keep or "regenerate".
45 filename
47 The name of the RRD you want to tune.
48 --heartbeat|-h ds-name:heartbeat
50 modify the heartbeat of a data source. By setting this to a
51 high value the RRD will accept things like one value per day.
52 --minimum|-i ds-name:min
54 alter the minimum value acceptable as input from the data
55 source. Setting min to 'U' will disable this limit.
56 --maximum|-a ds-name:max
58 alter the maximum value acceptable as input from the data
59 source. Setting max to 'U' will disable this limit.
60 --data-source-type|-d ds-name:DST
62 alter the type DST of a data source.
63 --data-source-rename|-r old-name:new-name
65 rename a data source.
66 --deltapos|-p scale-value
68 Alter the deviation scaling factor for the upper bound of the
69 confidence band used internally to calculate violations for the
70 FAILURES RRA. The default value is 2. Note that this parameter
71 is not related to graphing confidence bounds which must be
72 specified as a CDEF argument to generate a graph with
73 confidence bounds. The graph scale factor need not to agree
74 with the value used internally by the FAILURES RRA.
75 --deltaneg|-n scale-value
77 Alter the deviation scaling factor for the lower bound of the
78 confidence band used internally to calculate violations for the
79 FAILURES RRA. The default value is 2. As with --deltapos, this
80 argument is unrelated to the scale factor chosen when graphing
81 confidence bounds.
82 --failure-threshold|-f failure-threshold
84 Alter the number of confidence bound violations that constitute
85 a failure for purposes of the FAILURES RRA. This must be an
86 integer less than or equal to the window length of the FAILURES
87 RRA. This restriction is not verified by the tune option, so
88 one can reset failure-threshold and window-length
89 simultaneously. Setting this option will reset the count of
90 violations to 0.
91 --window-length|-w window-length
93 Alter the number of time points in the temporal window for
94 determining failures. This must be an integer greater than or
95 equal to the window length of the FAILURES RRA and less than or
96 equal to 28. Setting this option will reset the count of
97 violations to 0.
98 --alpha|-x adaption-parameter
100 Alter the intercept adaptation parameter for the Holt-Winters
101 forecasting algorithm. This parameter must be between 0 and 1.
102 --beta|-y adaption-parameter
104 Alter the slope adaptation parameter for the Holt-Winters
105 forecasting algorithm. This parameter must be between 0 and 1.
106 --gamma|-z adaption-parameter
108 Alter the seasonal coefficient adaptation parameter for the
109 SEASONAL RRA. This parameter must be between 0 and 1.
110 --gamma-deviation|-v adaption-parameter
112 Alter the seasonal deviation adaptation parameter for the
113 DEVSEASONAL RRA. This parameter must be between 0 and 1.
114 --smoothing-window|-s fraction-of-season
116 Alter the size of the smoothing window for the SEASONAL RRA.
117 This must be between 0 and 1.
118 --smoothing-window-deviation|-S fraction-of-season
120 Alter the size of the smoothing window for the DEVSEASONAL RRA.
121 This must be between 0 and 1.
122 --aberrant-reset|-b ds-name
124 This option causes the aberrant behavior detection algorithm to
125 reset for the specified data source; that is, forget all it is
126 has learnt so far. Specifically, for the HWPREDICT or
127 MHWPREDICT RRA, it sets the intercept and slope coefficients to
128 unknown. For the SEASONAL RRA, it sets all seasonal
129 coefficients to unknown. For the DEVSEASONAL RRA, it sets all
130 seasonal deviation coefficients to unknown. For the FAILURES
131 RRA, it erases the violation history. Note that reset does not
132 erase past predictions (the values of the HWPREDICT or
133 MHWPREDICT RRA), predicted deviations (the values of the
134 DEVPREDICT RRA), or failure history (the values of the FAILURES
135 RRA). This option will function even if not all the listed
136 RRAs are present.
137 Due to the implementation of this option, there is an indirect
139 impact on other data sources in the RRD. A smoothing algorithm
140 is applied to SEASONAL and DEVSEASONAL values on a periodic
141 basis. During bootstrap initialization this smoothing is
142 deferred. For efficiency, the implementation of smoothing is
143 not data source specific. This means that utilizing reset for
144 one data source will delay running the smoothing algorithm for
145 all data sources in the file. This is unlikely to have serious
146 consequences, unless the data being collected for the non-reset
147 data sources is unusually volatile during the reinitialization
148 period of the reset data source.
149 Use of this tuning option is advised when the behavior of the
151 data source time series changes in a drastic and permanent
152 manner.
153 --step|-t newstep
155 Changes the step size of the RRD to newstep.
156 TODO: add proper documentation
158 --daemon|-D address
160 NOTE: Because the -d (small letter 'd') option was already
161 taken, this function (unlike most other) uses the capital
162 letter 'D' for the one-letter option to name the cache daemon.
163 If given, RRDtool will try to connect to the caching daemon
165 rrdcached at address and will fail if the connection cannot be
166 established. If the connection is successfully established the
167 data for the filename will be flushed before performing the
168 copy/modify operation. Afterwards the filename will be
169 forgotten by the cache daemon, so that the next access using
170 the caching daemon will read the proper structure.
171 This sequence of operations is designed to achieve a consistent
173 overall result with respect to RRD internal file consistency
174 when using one of the DS or RRA changing operations (that is:
175 the resulting file should always be a valid RRD file,
176 regardless of concurrent updates through the caching daemon).
177 Regarding data consistency such guarantees are not made:
178 Without external synchronization concurrent updates may be
179 lost.
180 For a list of accepted formats, see the -l option in the
182 rrdcached manual.
183 DEL:ds-name
185 Every data source named with a DEL specification will be
186 removed. The resulting RRD will miss both the definition and
187 the data for that data source. Multiple DEL specifications are
188 permitted.
189 DS:ds-spec
191 For every such data source definition (for the exact syntax see
192 the create command), a new data source will be added to the
193 RRD. Multiple DS specifications are permitted.
194 DELRRA:index
196 Removes the RRA with index index. The index is zero-based, that
197 is the very first RRA has index 0.
198 RRA:rra-spec
200 For every such archive definition (for the exact syntax see the
201 create command), a new RRA will be added to the output RRD.
202 Multiple RRA specifications are permitted.
203 RRA#index:[+-=]<number>
205 Adds/removes or sets the given number of rows for the RRA with
206 index <index>. The index is zero-based, that is the very first
207 RRA has index 0.
208
210 "rrdtool tune data.rrd -h in:100000 -h out:100000 -h through:100000"
211 Set the minimum required heartbeat for data sources 'in', 'out' and
213 'through' to 100'000 seconds which is a little over one day in
214 data.rrd. This would allow to feed old data from MRTG-2.0 right into
215 RRDtool without generating *UNKNOWN* entries.
216
218 "rrdtool tune monitor.rrd --window-length 5 --failure-threshold 3"
219 If the FAILURES RRA is implicitly created, the default window-length is
221 9 and the default failure-threshold is 7. This command now defines a
222 failure as 3 or more violations in a temporal window of 5 time points.
223
225 "rrdtool tune some.rrd DEL:a RRA#0:+10"
226 Delete the data source named a and extend the very first archive by 10
228 rows. This will in fact replace the input RRD with a new RRD keeping
229 all existing data. For most practical use cases this is identical to a
230 real in-place modification.
231
233 Tobias Oetiker <tobi@oetiker.ch>, Peter Stamfest <peter@stamfest.at>
2341.7.1 2019-02-04 RRDTUNE(1)