Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

Voice recording CPU sizing

The table below shows the supported number of simultaneous voice calls per CPU core. 

...

* Single stream recording, e.g recording channel mixing on turrets

Sample calculations

ScenarioCPU sizing
Skype for Business recording for 1000 users
  • Skype for Business uses Silk for most call scenarios
  • GSM-FR is the recommended storage codec
  • To plan for the worst case, we assume 1000 simultaneous calls (duplex streams)
  • Encryption and voice quality checks are not required
  • CPU requirement: 1000 / 140 = 8
Trader voice recording for 500 users
  • Trader voice platforms use G.711 for most call scenarios
  • Speex is the recommended storage codec for platforms where there is no built-in DTX (e.g. IPTrade)
  • To plan for the worst case, we assume 4 simplex recording streams per turret (depends on the recording channel mixing configuration)
  • Encryption and voice quality checks are both required
  • CPU requirement: 500 x 4 / (198 x 0.9* x 0.85**) = 14

...