I have received a question from our network management group concerning how the packet loss is calculated by Smokeping.
I have tried to understand this and failed miserably. For example, here is a record from one of my rrd files: 1170982800: NaN 5.3841740667e+00 3.5863971281e-02 3.4867749856e-02 3.4867749856e-02 3.4867749856e-02 3.4867749856e-02 3.5863971281e-02 3.5863971281e-02 3.5863971281e-02 3.5863971281e-02 3.5863971281e-02 3.9848856978e-02 Loss 5.3841740667e+00 Ping Median 00 3.5863971281e-02 Ping 1 3.4867749856e-02 Ping 2 3.4867749856e-02 Ping 3 3.4867749856e-02 Ping 4 3.4867749856e-02 Ping 5 3.5863971281e-02 Ping 6 3.5863971281e-02 Ping 7 3.5863971281e-02 Ping 8 3.5863971281e-02 Ping 9 3.5863971281e-02 Ping 10 3.9848856978e-02 Several questions: Where did the 5.3841740667e+00 for packet loss come from? How was it calculated? Does the percentage reflecting in that calculation only come from this specific RRD record? How can a loss calculation base on 10 pings not return a loss percentage that is 10%, 20% 30%, etc? Or does it somehow span multiple records? All 10 fields in the record show values, although many are exactly the same, which is highly unlikely. I only see 3 unique values, which tells me that the packet loss was more like 70% (three good response time numbers and Smokeping likely just kept the previous value for the packets that were lost)? Help on these questions would be highly appreciated. Vern The information contained in this message and any attachment may be proprietary, confidential, and privileged or subject to the work product doctrine and thus protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately by replying to this message and deleting it and all copies and backups thereof. Thank you.
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