Data Throughput
These two formulas estimate data throughputs:
Formula 1 (for MP3 only):
MP3 bitrate * Ports / 8 = KB/sec
Or 32kbps * Ports / 8 =KB/sec if MP3 is 32kbps
Formula 2 (for MP3 + wav):
(MP3 bitrate + WAV bitrate) * Ports / 8 = KB/sec
Or (32 kbps + 128 kpbs) * Ports / 8 = 160 kbps / 8 = KB/sec if 32kpbs MP3 + wav
Six VM configurations, with SSD as the cache folder for MCP recording, produced the following measurements from testing for test SW Profile 1 (MP3 32 kbps only):
Table: Data Throughputs for MP3 32 kbps only
| Ports | Overall Disk (kbps) | SSD Drive Disk (kbps) | ||||
|---|---|---|---|---|---|---|
| Total | Reads | Writes | Total | Reads | Writes | |
| 120 | 554.10 | 0.12 | 553.98 | 536.98 | 0.00 | 536.98 |
| 240 | 1075.70 | 0.50 | 1075.19 | 1053.19 | 0.00 | 1053.19 |
| 300 | 1332.61 | 0.06 | 1332.55 | 1308.69 | 0.00 | 1308.69 |
| 360 | 1601.09 | 0.00 | 1601.09 | 1575.02 | 0.00 | 1575.02 |
| 420 | 1847.91 | 0.00 | 1847.91 | 1822.30 | 0.00 | 1822.30 |
| 480 | 2109.57 | 0.00 | 2109.57 | 2082.49 | 0.00 | 2082.49 |
| 540 | 2461.25 | 0.00 | 2461.25 | 2434.04 | 0.00 | 2434.04 |
| 600 | 2728.83 | 0.00 | 2728.83 | 2702.57 | 0.00 | 2702.57 |
| 660 | 3010.07 | 0.00 | 3010.07 | 2982.84 | 0.00 | 2982.84 |
| 720 | 3310.64 | 0.00 | 3310.64 | 3280.45 | 0.00 | 3280.45 |
Apply Formula 1 to the 120-port and 600-port samples from the table above to achieve these results:
32 kpbs * 120 / 8 = 480 kb close to 534 in the table (in SSD)
32 kpbs * 600 / 8 = 2400 kb close to 2703 in the table (in SSD)
The measurements from real testing are slightly higher than calculations. Because other files such as metadata and JSON files are saved in the same cache folder, the formula might need adjusting.
Below is the table from testing measurement for SW Profile 2 (MP3 + wav) on the same 6 VM configuration with SSD as cache folder of MCP recording:
Table: Data Throughputs for MP3 32 kbps + wav
| Ports | Overall Disk (kbps) | SSD Drive Disk (kbps) | ||||
|---|---|---|---|---|---|---|
| Total | Reads | Writes | Total | Reads | Writes | |
| 120 | 2444.255 | 0.25 | 2444.01 | 2427.025 | 0.000 | 2427.025 |
| 240 | 4881.163 | 0.01 | 4881.15 | 4859.951 | 0.000 | 4859.951 |
| 300 | 6083.649 | 0.00 | 6083.64 | 6058.294 | 0.000 | 6058.294 |
| 360 | 7380.491 | 0.00 | 7380.49 | 7354.970 | 0.000 | 7354.970 |
| 420 | 8547.663 | 0.00 | 8547.66 | 8522.034 | 0.000 | 8522.034 |
| 480 | 9828.785 | 0.00 | 9828.79 | 9802.991 | 0.000 | 9802.991 |
| 540 | 11093.931 | 0.00 | 11093.93 | 11067.838 | 0.000 | 11067.838 |
| 600 | 12335.993 | 0.01 | 12335.99 | 12309.182 | 0.000 | 12309.182 |
Apply Formula 2 to the 120-port and 600-port samples in the table above to achieve these results:
(32 kbps + 128 kbps) * 120 / 8 = 2400 kb close to 2427 in the table
(32 kbps + 128 kbps) * 600 / 8 = 12000 kb close to 12309 in the table