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fioplot-bs is a utility that allows you to create graphs and xlsx tables based on the results of the performance testing utility – FIO.

Features and functionality

  1. Compares the results of different tests with the same patterns, creating a general report.

    This is very convenient if you compare the performance of different software solutions using the same hardware and the same testing patterns (fio config). How it works will be written in the “How it works” section.

  2. Generates CSV tables for each test for visual convenience.

    Basic functionality. Generates a CSV table for each *.json file with FIO results.

  3. Able to work with log files.

    In the current version of the program, it is not yet possible to generate graphs for results from different tests with common patterns. But it is possible to turn the log files for bandwich and latency obtained from FIO into visual diagrams for a specific test. This is useful for finding/analyzing/detecting latency and performance spikes.

  4. Draws graphs and charts in various formats.

    At the moment, graphs and charts can be created in the following formats: .jpg, .jpeg, .pdf, .png, .svg, .tex, .tif and .tiff

  5. Able to generate reports with a graphical representation in the form of xslx tables.

    This is done for the convenience of uploading results to cloud storages, such as google drive. Such a report has a separate page for each type (Performance, IOPS, Latency, and so on), as well as a separate page with graphs from data from all pages.

How it works

Preparation and dependencies

To build and run the utility, you need the golang package on your system (you can download it on the official website here).


git clone

cd fioplot-bs

go build -v

./fioplot-bs -h

Example usage

Before you need this utility, you need to perform the required testing using the FIO utility. For this test, you need to run the FIO command with the options: –output-format=normal,json –output=TestA.json or just –output-format=json –output=TestB.json. For example:

fio /fio_config.cfg --output-format=normal,json --output=TestA.json

Where /fio_config.cfg this is configuration for tests. How to create test configurations for FIO can be found here.

Further, when the results are already available, you can put them in one directory and specify this directory in fioplot-bs as the directory where the results are stored in the form of JSON (For example: –path=/home/fioResults/).

Expected file tree for the directory with FIO results from which graphs/charts and reports will be built:

ls -l /home/fioResults/
> -rw-r--r--  1 user  staff  899793 Apr  7 07:18 TestA.json
> -rw-r--r--  1 user  staff  899234 Apr  7 09:10 TestB.json
> -rw-r--r--  1 user  staff  812257 Apr  7 11:20 TestC.json
> drwxr-xr-x 87 user  staff    2784 Apr 29 17:49 LogsTestA
> drwxr-xr-x 87 user  staff    2784 Apr 29 17:49 LogsTestB
> drwxr-xr-x 87 user  staff    2784 Apr 29 17:49 LogsTestC

Where the logs directories looks something like this:

ls -l /home/fioResults/

> -rw-r--r--  1 user  staff  14658 Dec 13  2021 write-64k-0_bw.376.log
> -rw-r--r--  1 user  staff  15219 Dec 13  2021 write-64k-0_clat.376.log
> -rw-r--r--  1 user  staff  13221 Dec 13  2021 write-64k-0_iops.376.log
> -rw-r--r--  1 user  staff  15220 Dec 13  2021 write-64k-0_lat.376.log
> -rw-r--r--  1 user  staff  13959 Dec 13  2021 write-64k-0_slat.376.log

fioplot-bs usage example:

./fioplot-bs --name=MyFirstTest --path=/home/fioResults --loggraphs


  • –name – Specifies the common name of the test (Ex. Comparison-of-market-storage-leaders). Specified without spaces. And serves as the name of the directory where the results will be generated

  • –path – The directory where you put the results from different tests as JSON files. (The extension must also be *.json)

  • –loggraphs – The flag for creating graphs from log files. If you don’t have logging files, don’t specify it.

Upon successful completion, a directory with results will appear with the following hierarchy:


Random sample from graph and charts for example:

fioplot-bs example

You can also see the entire list of available options and commands by running the command:

./fioplot-bs --help

For Developers

Get packages

go get
go get
go get

Example with code

Here is a minimal example usage that will create charts or report.

package main

import (


func main() {
    var csvFiles []string
    var jsonFiles []string{"TestA.json", "TestB.json", "TestC.json"}

    for _, json := range jsonFiles {
        csvFileName := strings.Replace(json, ".json", ".csv", -1)
	    if err := csvtable.ConvertJSONtoCSV(json, csvFileName); err != nil {
        csvFiles = append(csvFiles, csvFileName)

    if err := barchart.CreateBarCharts(csvFiles, "MyFirstBarCharts", "/home/MyReport/", "svg"); err != nil {
        fmt.Printf("could not create barCharts.\n Error: %v\n", err)
    } else {
        fmt.Println("Results and graphs were generated successfully!")


Contributions are welcome! Open a pull request to fix a bug, or open an issue to discuss a new feature or change.


This program is under the terms of the BSD 3-Clause License. See

gopher.{ai,svg,png} was created by Takuya Ueda. Licensed under the Creative Commons 3.0 Attributions license.

This utilities uses packages Gonum Plot to generate barcharts and graphs. “Gonum Plot” licensed under the BSD 3-Clause License.

This utilities uses package Excelize to generate xlsx file. “Excelize” licensed under the BSD 3-Clause License.


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