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transform_latency.md

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Transformer: Latency Computing

Use this feature to compute latency and detect queries timeout

Options:

  • measure-latency (boolean)

    measure latency between replies and queries

  • unanswered-queries (boolean)

    Detect evicted queries

  • queries-timeout (integer)

    timeout in second for queries

transforms:
  latency:
    measure-latency: false
    unanswered-queries: false
    queries-timeout: 2

Example of DNS messages in text format

  • latency
2023-04-11T18:23:45.564128Z unbound CLIENT_QUERY NOERROR 127.0.0.1 35255 IPv4 UDP 50b google.fr A 0.000000
2023-04-11T18:23:45.56424Z unbound FORWARDER_QUERY NOERROR 0.0.0.0 34329 IPv4 UDP 38b google.fr A 0.000000
2023-04-11T18:23:45.57501Z unbound FORWARDER_RESPONSE NOERROR 0.0.0.0 34329 IPv4 UDP 54b google.fr A 0.010770
2023-04-11T18:23:45.575113Z unbound CLIENT_RESPONSE NOERROR 127.0.0.1 35255 IPv4 UDP 54b google.fr A 0.010985
  • unanswered queries
2023-04-11T18:42:50.939138364Z dnsdist1 CLIENT_QUERY NOERROR 127.0.0.1 52376 IPv4 UDP 54b www.google.fr A 0.000000
2023-04-11T18:42:50.939138364Z dnsdist1 CLIENT_QUERY TIMEOUT 127.0.0.1 52376 IPv4 UDP 54b www.google.fr A -