smokeping_matchers_exploss(3) [debian man page]
..::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)
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..::lib::Smokeping::matchers::Medratio(3) SmokePing ..::lib::Smokeping::matchers::Medratio(3) NAME
Smokeping::matchers::Medratio - detect changes in the latency median OVERVIEW
The Medratio matcher establishes a historic median latency over several measurement rounds. It compares this median, against a second median latency value again build over several rounds of measurement. By looking at the median value this matcher is largly imune against spikes and will only react to long term developments. DESCRIPTION
Call the matcher with the following sequence: type = matcher pattern = Medratio(historic=>a,current=>b,comparator=>o,percentage=>p) historic The number of values to use for building the 'historic' median. current The number of values to use for building the 'current' median. 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 the 12 last median values. Build the median out of the first 10 and the median from the other 2 values. Divide the results and decide if it is bigger than 150 percent. Medratio(historic=>10,current=>2,comparator=>'>',percentage=>150); med(current)/med(historic) > 150/100 This means the matcher will activate when the current latency median is more than 1.5 times the historic latency median established over the last 10 rounds of measurement. COPYRIGHT
Copyright (c) 2006 by OETIKER+PARTNER AG. All rights reserved. SPONSORSHIP
The development of this matcher has been paied for 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::Medratio(3)