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README.md

Storage Read Write Energy

This plugin allows you to estimate the energy required to read/write data to a storage device, amount of data and drive type

Parameters

Plugin Config

Not Needed

Inputs

  • duration: Length of time the it will take to read/write the data
  • storage/drive-read-write-power: Power of the drive(s), when reading/writing, used in Watts
  • storage/drive-read-write-speed: Read/write speed of storage device used in GB/s
  • storage/data-transfer: Amount of data to be read/written in GB

Returns

An array containing:

  • duration: Length of time the it will take to read/write the data
  • storage/drive-read-write-power: Power of the drive(s), when reading/writing, used in Watts
  • storage/drive-read-write-speed: Read/write speed of storage device used in GB/s
  • storage/data-transfer: Amount of data to be read/written in GB
  • storage/energy: The energy apportioned to reading/writing data in kWh

Errors

Can throw errors in the following situations:

  • Any of duration, storage/drive-read-write-power, storage/drive-read-write-speed or storage/data-transfer are not present in the input.
  • Any of duration, storage/drive-read-write-power, storage/drive-read-write-speed or storage/data-transfer are not numbers.
  • Any of duration, storage/drive-read-write-power, storage/drive-read-write-speed or storage/data-transfer are not positive.

IF Implementation

To avoid tying the plugin to any point in time data, it requires the individual drive details to be passed in.Calculates the minimum time that that data could be written/read in, using:

$$\frac{data\text-transfer}{drive\text-read\text-write\text-speed} = min \space time$$

If this is greater than the provided duration it will use this instead. The formula for energy estimation is then:

$$\frac{drive\text-read\text-write\text-power}{1000} \times \frac{duration}{60 \times 60} = energy$$

Where $\frac{drive\text-read\text-write\text-power}{1000}$ gives a figure for kW and $\frac{duration}{60 \times 60}$ gives the time in hours.

Unit tests

Unit tests available here

Example manifest

Example manifest available here