Introduction
This is a project suggested by Bebo White to build a PingER monitoring host based on an inexpensive hardware called Raspberry Pi (see more about Raspberry Pi) using a linux distribution as OS (see more about Raspbian). If successful one could consider using these in production reducing the costs, power drain (they draw about 2W of 5V DC power compared to typically over 100W for a deskside computer or 20W for a laptop) and space (credit card size) assisting monitoring sites to be able to procure and support such monitoring hosts. This could be very valuable for sites in developing countries where cost, power utilization and to a lesser extent space may be crucial.
Raspberry Pi Model and Specifications
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| Time Series | Frequency distribution RTT | Frequency distribution Abs(IPD) | ||
|---|---|---|---|---|
| pinger to sitka | ||||
| pinger-raspberry to sitka |  |  |
| pinger.slac.stanford.edu to sitka.triumf.ca | pinger-raspberry.slac.stanford.edu to sitka.triumf.ca | |
|---|---|---|
| Time Series | |  |
| Frequency distribution RTT | |  |
| Frequency distribution Abs(IPD) |  |  |
| Frequency distribution IPD |
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|
To CERN from SLAC
| To ping.cern.ch from pinger | To ping.cern.ch from pinger-raspberry | |
|---|---|---|
| Time series |  |  |
| Frequency Distribution RTT |
|   |
Frequency Distribution Abs(IPD) |
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| Frequency Distribution IPD |
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| Metric | pinger to pinger-raspberry | pinger-raspberry to pinger | pinger to sitka | pinger-raspberry to sitka | pinger to CERN | pinger-raspberry to CERN |
|---|---|---|---|---|---|---|
Min RTT | 0.43 ms | 0.41 ms | 22 ms | 22.3 ms | 150 ms | 151 m2 |
| Avg RTT | 0.542 ms | 0.529 ms | 23.9 ms | 23.827 ms | 150.307 ms | 151.024 ms |
Max RTT | 1.15 ms | 20.8 ms | 761 ms | 334 ms | 288 ms | 183 ms |
| Median RTT | 0.542 ms | 0.51 ms | 22.3 ms | 22.7 ms | 150 ms | 151 ms |
| 25% | 0.514 ms | 0.48 ms | 22.2 ms | 22.69 ms | 149.99 ms | 150.99 ms |
| 75% | 0.564 ms | 0.532 ms | 22.4 ms | 22.8 ms | 151 ms | 151 ms |
| IQR | 0.05 ms | 0.052 ms | 0.2 ms | 0.11 ms | 1.01 ms | 0.01 ms |
| Min IPD | -0.59 ms | -20.29 ms | -244 ms | -235.1 ms | ||
| Avg IPD | 0 ms | 0 ms | 0 ms | 0 | ||
| Max IPD | 0.62 ms | 20.26 ms | 268 ms | 146 ms | ||
| Median IPD | 0 ms | 0 ms | 0 ms | 0 ms | ||
| 25% IPD | -0.04 ms | -0.03 ms | -0.1 ms | -0.11 ms | ||
| 75% IPD | 0.03 ms | 0.02 ms | 0.09 ms | 0.1 ms | ||
| IQR IPD | 0.07 ms | 0.05 ms | 0.190 ms | 0.210 ms | ||
| Min(abs(IPD)) | 0 ms | 0 ms | 0 ms | 0 ms | 0 ms | 0 ms |
| Avg(abs(IPD)) | 0.041 ms | 0.066 ms | 0.424 ms | 0.406 ms | 0.386 ms | 0.046 ms |
| Max(abs(IPD)) | 0.0628ms | 20.294 ms | 268 ms | 235.1 ms | 138 ms | 32 ms |
| Median(abs(IPD)) | 0.03ms | 0.024 ms | 0.09 ms | 0.1 ms | 0 ms | 0 ms |
| 25%(abs(IPD)) | 0.01ms | 0.008 ms | 0.01 ms | 0.01 ms | 0.01 ms | 0.01 ms |
| 75%(abs(IPD)) | 0.058 ms | 0.05 ms | 0.1 ms | 0.19 ms | 1 ms | 0 ms |
| IQR(abs(IPD) | 0.048 ms | 0.042 ms | 0.09 ms | 0.11 ms | 0.009 ms | 0.01 ms |
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