How Grafana is converting the values bits/sec into the Gbps

arjunsutar · March 25, 2020, 12:47pm

Dear Team,
I would like know that, how Grafana Dashboard panel converting the values from bits/sec to Gbps and vice versa. We are observing some abonarmility in dashboard.

Regards
Arjun

marcusandersson · March 25, 2020, 3:39pm

Hello @arjunsutar!

This is a good question. We are using the following function to scale up/down the units depending on the value. Are you comfortable reading typescript? If not I am happy to help you out translating what the function does.

github.com

grafana/grafana/blob/9b7748ec133cb2ce4b092e523cb6d70a7b89de83/packages/grafana-data/src/valueFormats/valueFormats.ts#L88


    if (size === null) {
      return '';
    }
    return toFixed(size, decimals) + ' ' + unit;
  };
}


// Formatter which scales the unit string geometrically according to the given
// numeric factor. Repeatedly scales the value down by the factor until it is
// less than the factor in magnitude, or the end of the array is reached.
export function scaledUnits(factor: number, extArray: string[]) {
  return (size: number, decimals?: DecimalCount, scaledDecimals?: DecimalCount) => {
    if (size === null) {
      return '';
    }
    if (size === Number.NEGATIVE_INFINITY || size === Number.POSITIVE_INFINITY || isNaN(size)) {
      return size.toLocaleString();
    }


    let steps = 0;
    const limit = extArray.length;

arjunsutar · March 26, 2020, 3:53am

Hi Marcusandersson ,

Thank you very much for your and support. I am not comfortable to read such scripts .
I would appreciated if you explain in simple way. Actaully we have on NDS server from where we are collecting data on Grafana dashboard .

In NDS server bits/sec to Gbps values are showing correct. But Grafana dashboard there is some descripency on values . Values are showoing less in Grafana (10Gb).

How does Grafana converting this values from bits/sec to Gbps .
Also if I want to see values in Bytes that time on panel vaules are showing Zbps …

How to covert this Zbps into bytes.

Regards
Ajun

clanlaw · March 26, 2020, 3:40pm

Please give an example of what you think it should be and what it is.
Also hover over it to see what that shows.

clanlaw · March 26, 2020, 3:42pm

Have you got Mean or something similar specified in the query? If so then remember that the value will be the average over the pixel width, not the value at the end of pixel.

arjunsutar · April 1, 2020, 7:14am

Dear Clanlaw & Marcusandersson

Thank you very much reply. I have sorted this issue, actually we were getting less values from Elasticsearch to Grafana. Thanks for your support.

Regards
Arjun Sutar