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RRDtool Proxy Server - Backup
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Load Balancing
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If both main and backup proxy are receivable this option allows to spread all requests against RRDtool.
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The DNS hostname or IP address of the RRDtool backup proxy server if proxy is running in MSR mode.
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TCP port for encrypted communication with the backup proxy.
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The fingerprint of the current public RSA key the backup proxy is using. This required to establish a trusted connection.
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Spike Kill Settings
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Removal Method
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There are two removal methods. The first, Standard Deviation, will remove any sample that is X number of standard deviations away from the average of samples. The second method, Variance, will remove any sample that is X% more than the Variance average. The Variance method takes into account a certain number of 'outliers'. Those are exceptional samples, like the spike, that need to be excluded from the Variance Average calculation.
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Standard Deviation
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Variance Based w/Outliers Removed
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Replacement Method
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There are three replacement methods. The first method replaces the spike with the average of the data source in question. The second method replaces the spike with a 'NaN'. The last replaces the spike with the last known good value found.
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Average
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NaN's
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Last Known Good
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Number of Standard Deviations
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Any value that is this many standard deviations above the average will be excluded. A good number will be dependent on the type of data to be operated on. We recommend a number no lower than 5 Standard Deviations.
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%d Standard Deviations
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Variance Percentage
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