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Power Dashboard

A client-side boilerplate for displaying near-real-time data from a data center.

  • Interactive wheel graph and histograms for up to 4 metrics
  • Boilerplate HTML code for displaying these components on a web page
  • Configuration to bridge to a data center's JSON-based API (and not just limited to data centers)

Use this in conjunction with the back-end project:


Getting Started

  1. Install gulp and Bower globally by running npm install -g gulp && npm install -g bower
  2. Install dependencies by running npm install && bower install from your project's root
  3. Build the project by running gulp (or gulp --production for production use) from your project's root (outputs to ./build, which is referenced in demo/index.html)
  4. Connect the dashboard to your API, by providing your server and metric settings (see Configuration) inside of demo/application.js
  5. Test your connect with a local HTTP server, e.g. SimpleHTTPServer



All exposed configuration is sent when instantiating PowerDashboard.

An example of how to instantiate this is available in demo/application.js

	wheelGraphEndpointAlias: '24-hours', // See 'Configuration > API > URL structure' for more details
	wheelGraph: true, // Set to 'false' to disable the wheel graph
	histograms: true, // Set to 'false' to disable the set of histograms
	apiConfig: {
		// This is your host. No trailing slash
		host: 'http://localhost:3000'

		// This is an optional prefix for the URI, with no leading or trailing slash
		// See 'Configuration > API > URL structure' for more details
		uriPrefix: 'my/directory'
	metrics: [
			// This references a key in your API responses (see Configuration > API > Data point structure)
			alias: 'humidity',

			name: 'Humidity',

			// By default, the range of data will use the min and max values from the points provided
			// ... `minDomainDifference` can compliment this by ensuring there's a minimum range
			minDomainDifference: 0.05
			alias: 'pue',
			name: 'PUE',

			// You can also define hard boundaries using `domain`
			domain: {
				min: 1.0,
				max: 1.2

Markup configuration

Accordion metrics

  • DOM reference: .metric-display
  • Description: This should reference one of your available metrics, as part of the overall group. These will display in an accordion-style UI.
  • data- attributes:
    • metric="your-metric-alias": This should match PowerDashboard configuration
    • view-mode="temperature" or data-view-mode="percentage": if one of your metrics is based around percentage or temperature, you can utilise these view modes to renders the values accordingly.

4 example histograms are available in the demo/index.html boilerplate.

Date range filters

  • DOM reference: .date-range-nav a
  • Description: Its purpose is to pass a specific date range into the histogram and refresh the data, with the following attributes:
  • data- attributes:
    • range="12-days": This is your endpoint alias
    • unit="days": This is a natural language label, which must be parseable into a date range, e.g. days, months, years
    • range-value="12": An integer to compliment the data-unit, which is utilised by the graph to accurately render the data points
    • steps="4": How many dividing lines should be on the histogram's x-axis

4 example date ranges are available in the demo/index.html boilerplate.


  • DOM reference: '.histogram'
  • Description: Displays filtered metric data points on a histogram
  • data- attributes:
    • metric="your-metric-alias": This should match PowerDashboard configuration

4 example histograms are available in the demo/index.html boilerplate.


Here are some instructions on ensuring your API is compatible with the Power Dashboard:

URL structure

URLs are concatenated on the client-side, using a combination of server settings, a metric alias, and an endpoint alias.

[host]/[uriPrefix]/[endpoint alias].json

  • host: see Configuration > PowerDashboard > apiConfig
  • uriPrefix: see Configuration > PowerDashboard > apiConfig
  • endpoint alias: If it is the Wheel Graph which is requesting data, this is controlled under Configuration > PowerDashboard > apiConfig > wheelGraphEndpointAlias. Otherwise, this comes from the date range filters (see Markup configuration> Date range filters)

Data point structure

As a response from each endpoint (e.g. 1-year.json), Power Dashboard expects an JSON-formatted array of data point objects, ordered oldest-first. Each data point object expects the following data:

		"timestamp": 1389087180000,
		"my_data_point": 135,
		"my_other_point": 4
	}, {
		"timestamp": 1389087190000,
		"my_data_point": 115,
		"my_other_point": 1
	// ...

Average data ranges

Histograms support average ranges, which show a transparent range line behind the average data, to show minimum and maximum values at a given time. To output this in the API, you format each data point object as the following:

	"timestamp": 1389087180000,
	"my_point": 1.5,
	"min_my_point": 1, // The same alias, but prefixed with min_
	"max_my_point": 2, // This same alias, but prefixed with max_
	"my_other_point": 235


Power Dashboard has the following dependencies:

  • jQuery & Underscore — DOM and JS utilities
  • D3 — SVG library, used for the graphs
  • Backbone — interfaces with the graph to display the 'current metrics', and control the Accordion UI.
  • Sylvester — vector calculation for graphs
  • Tween.js — tweening for the graphs, utilising window.requestAnimationFrame
  • Simple Inheritance — inheritance for JS objects, used for the app's components
  • Moment — data/time parsing
  • Normalize.css — a browser reset stylesheet
  • Modernizr — browser feature detection
  • Animation Frame — shim for requestAnimationFrame function
  • jQuery tinypubsub — a global publish/subscribe pattern for some components


The source code is licensed under the BSD-style license found in the LICENSE file in the root directory of this source tree. An additional grant of patent rights can be found in the PATENTS file in the same directory.


The front-end to a simple application that displays Facebook's datacenter power consumption and other information.




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