September 2024
Intermediate to advanced
488 pages
15h 59m
Spanish
Content preview from Kafka: La Guía Definitiva, 2ª Edición
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Capítulo 8. Semántica Exactamente Una Vez
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En el Capítulo 7 hablamos de los parámetros de configuración y las buenas prácticas que permiten a los usuarios de Kafka controlar las garantías de fiabilidad de Kafka. Nos centramos en la entrega al menos una vez, es decir, la garantía de que Kafka no perderá los mensajes que haya reconocido como enviados. Esto sigue dejando abierta la posibilidad de mensajes duplicados.
En sistemas sencillos en los que los mensajes son producidos y luego consumidos por varias aplicaciones, los duplicados son una molestia bastante fácil de manejar. La mayoría de las aplicaciones del mundo real contienen identificadores únicos que las aplicaciones consumidoras pueden utilizar para deduplicar los mensajes.
Las cosas se complican cuando examinamos las aplicaciones de procesamiento de flujos que agregan eventos. Al inspeccionar una aplicación que consume eventos, calcula un promedio y produce los resultados, a menudo es imposible que quienes comprueban los resultados detecten que el promedio es incorrecto porque un evento se procesó dos veces al calcular el promedio. En estos casos, es importante proporcionar una garantía más sólida: la semántica del procesamiento exactamente una vez.
En este capítulo, hablaremos de cómo utilizar Kafka con la semántica exactamente una vez, los casos de uso recomendados y las limitaciones. Al igual que hicimos ...
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