rrd_hwreapply - Re-apply Holt-Winters prediction parameters to RRD data
rrd_hwreapply in.rrd out.rrd [--force] [--start=start] [--delta=scale-value] [--deltapos=scale-value] [--deltaneg=scale-value] [--failure-threshold=failure-threshold] [--window-length=window-length] [--alpha=adaption-parameter] [--beta=adaption-parameter] [--gamma=adaption-parameter] [--gamma-deviation=adaption-parameter] [--rralen=rows] [--season=rows] [--defaults]
The prorgam takes the input RRD, and copies all data to the output RRD, with new Holt-Winters prediction parameters applied. If the input file is not Holt-Winters enabled, all parameters must be specified, or use the --defaults option.
The resulting RRD will not contain exactly the same data as the source file. It is a result of numerous transformations during the data fetching and storing. However, the tests have shown quite good results: for a counter with average values of order of 1e+06, the resulting data relative difference is of order of 1e-10. For a counter with average values at the level of 1e+03, the precision is approximately 1e-08.
rrdtune(1)and the article of Jake Brutlag on Aberrant Behavior Detection.
delta = 2 alpha = 0.1 beta = 0.0035 gamma = 0.1 window_length = 9 failure_threshold = 6 hw_rra_length = 4032 seasonal_period = 288
This program requires RRDtool version 1.1.x (currently available as development snapshot only), Perl version 5.8.2 (version 5.8.0 is known to have bugs which break this utility).
RRDman is a set of utilities that manipulate the RRDtool database files.
Stanislav Sinyagin <email@example.com>