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While clients must support both temporalities, the broker will initially only send GetTelemetrySubscriptionsResponse.DeltaTemporality=True. Configuration properties or extensions to the Metrics plugin interface on the broker to change the temporality is outside the scope of this KIP and may be addressed at a later time as the need arises.

See OTLP specification for more information on temporality.

Serialized size

As an example, the serialized size prior to compression of all producer and standard metrics defined in this KIP for a producer producing to 50 partitions gives approximately 100 kB.

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