I have 2 services: producer and consumer.
As far as I understand, message.ts is the time the producer produced the message (not the time the kafka-broker received the message).
When the consumer consume the message, how can I know how much time it was inside the kafka-broker (without the network latency: from producer to kafka-broker and from kafka-broker to consumer)?
I did a ping from my consumer vm to the kafka broker. the ping result was 0.7ms (millisecond). Does the network latency from each side to the kafka broker is 0.3ms? I assume kafka transport is TCP so there is a "ACK" message for everything. And I assume that each side won't do nothing without "ACK" so I conclude that the network latency on each size is the same as the ping result: 0.7ms (millisecond). Am I correct?
I tested manually this by producing and consuming from the same vm to a kafka (which was inside my cluster). The result was 1.3-1.5 ms.
It means that the procssing time took 0.1 ms on average.
This is not the best solution, but it is suffient to my research.