Packet loss

[joshuar]

Packet loss

[joshuar]

This will require some thought to implement. Right now each event recorded in ES represents a measurement of RTT. I'm not sure I'm comfortable recording zero or nil, or a negative value or some huge value to indicate loss that might interfere with any aggregations done on the data. It might be better to record a "loss" in a different event.

[joshuar]

I believe tracking packet loss is addressed in faster-main-loop branch. In that branch, the period config option becomes the max RTT you'd expect, and any ICMP requests not responded to in that period are considered lost. Then, in the Elasticsearch event, I write this as a loss: true bool field instead of the rtt: somevalue field. You can then do you aggregations on how many events have loss: true to calculate your packet loss.

I'll probably merge that branch into master in the next few days.

[Noebas]

I have the new version running and this solution is perfect. Have RTT in one chart and the LOSS in another.
Ping to 150 hosts and a interval of 2 sec seems te be ok.