heatmap.sh - Heatmap cli

heatmaps in your terminal

Inspiration (and notes/refs)

Based off: holman/spark

Notes

• https://github.com/brendangregg/HeatMap
  • Latency
    • X: Time
    • Y: Latency
    • Z: Frequency? (Count)
• https://github.com/holman/spark
• d3.js gallery
  • Day / Hour Heatmap
  • Heatmap (2D Histogram, CSV)
  • Heatmap (Canvas, JSON)
  • Scatterplot
  • Treemap
• Using R to draw a Heatmap

Ideas

Data-center (groups) activity blinkenlights

• Rel: http://dtrace.org/blogs/brendan/2011/12/18/visualizing-device-utilization/ (see: Animated Data)
• Axes
  • X: Grouping (datacenter)
  • Y: Time (0-24 hours)
  • Z: Usage (agg, avg, cpu usage)
• Replay the time-series to show over longer spans of time (animate)

Info and example

Example from Day / Hour Heatmap

$ ./heatmap.sh 24 16 20 0 0 0 2 0 9 25 49 57 61 37 66 70 55 51 55 17 20 9 4 0 12 6 2 0 0 0 2 4 11 28 49 51 47 38 65 60 50 65 50 22 11 12 9 0 13 5 8 8 0 0 2 5 12 34 43 54 44 40 48 54 59 60 51 21 16 9 5 4 7 0 0 0 0 0 2 4 13 26 58 61 59 53 54 64 55 52 53 18 3 9 12 2 8 2 0 8 2 0 2 4 14 31 48 46 50 66 54 56 67 54 23 14 6 8 7 0 8 2 0 2 0 0 0 4 8 8 6 14 12 9 14 0 4 7 6 0 0 0 0 0 0 7 6 0 0 0 0 0 0 0 0 2 2 5 6 0 4 0 2 10 7 0 19 9 4
░▒░░░░░░▒▓▓█▒██▓▓▓░▒░░░░
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░░░░░░░░▒▓█▓▓▓█▓▓▓░░░░░░
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Compare to:

X     Z
|   /
|  /
| /
|/
*____ Y

Use:

• ░ Light shaded block
• ▒ Medium shaded block
• ▓ Dark shaded block
• █ Darker shaded block