smokeping_matchers_avgratio(3) [debian man page]
..::lib::Smokeping::matchers::Avgratio(3) SmokePing ..::lib::Smokeping::matchers::Avgratio(3) NAME
Smokeping::matchers::Avgratio - detect changes in average median latency OVERVIEW
The Avgratio matcher establishes a historic average median latency over several measurement rounds. It compares this average, against a second average latency value again build over several rounds of measurement. DESCRIPTION
Call the matcher with the following sequence: type = matcher pattern = Avgratio(historic=>a,current=>b,comparator=>o,percentage=>p) historic The number of median values to use for building the 'historic' average. current The number of median values to use for building the 'current' average. comparator Which comparison operator should be used to compare current/historic with percentage. percentage Right hand side of the comparison. old <--- historic ---><--- current ---> now EXAMPLE
Take build the average median latency over 10 samples, use this to divide the current average latency built over 2 samples and check if it is bigger than 150%. Avgratio(historic=>10,current=>2,comparator=>'>',percentage=>150); avg(current)/avg(historic) > 150/100 This means the matcher will activate when the current latency average is more than 1.5 times the historic latency average established over the last 10 rounds of measurement. COPYRIGHT
Copyright (c) 2004 by OETIKER+PARTNER AG. All rights reserved. SPONSORSHIP
The development of this matcher has been sponsored by Virtela Communications, <http://www.virtela.net/>. LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. AUTHOR
Tobias Oetiker <tobi@oetiker.ch> 2.6.8 2012-02-26 ..::lib::Smokeping::matchers::Avgratio(3)
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..::lib::Smokeping::matchers::ExpLoss(3) SmokePing ..::lib::Smokeping::matchers::ExpLoss(3) NAME
Smokeping::matchers::ExpLoss - exponential weighting matcher for packet loss with RMON-like thresholds DESCRIPTION
Match against exponential weighted average of last samples, thus new values are more valuable as old ones. Two thresholds - rising and falling - produce hysteresis loop like in RMON alert subsystem. If the average reaches the "rising" threshold, matcher go to the "match" state and hold It until the average drops under the "falling" threshold. Call the matcher with the following sequence: type = matcher pattern = CheckLoss(hist => <hist>, rising=><rising> [,falling => <falling>] [,skip=><stat>] [,fast=><fast>]) Arguments: hist - number of samples to weight against; weight will be disposed with exponetial decreasing manner from newest to oldest, so that the oldest sample would have 1% significance; rising - rising threshold for packet loss, 0-100% falling - falling threshold for packet loss, default is <rising> skip - skip <skip> number of samples after startup before "fire" alerts. fast - use <fast> samples for fast transition: if the values of last <fast> samples more then <rising> - take "match" state, if less then <falling> - take "no match" state. Note: If the actual history is less then <hist> value then this value is taken as the actual history. COPYRIGHT
Copyright (c) 2008 Veniamin Konoplev Developed in cooperation with EU EGEE project LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. AUTHOR
Veniamin Konoplev <vkonoplev@acm.org> 2.6.8 2012-02-26 ..::lib::Smokeping::matchers::ExpLoss(3)