March 2025
Intermediate to advanced
546 pages
16h 23m
Spanish
Content preview from Fundamentos de la arquitectura de software, 2.ª edición
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Capítulo 16. Estilo arquitectónico basado en el espacio
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La mayoría de las aplicaciones empresariales basadas en web siguen el mismo flujo general de peticiones: una petición de un navegador llega al servidor web, luego a un servidor de aplicaciones y, por último, al servidor de base de datos. Aunque este flujo de peticiones típico funciona para un pequeño conjunto de usuarios concurrentes, los cuellos de botella empiezan a aparecer a medida que aumenta la carga de usuarios concurrentes: primero en la capa del servidor web, luego en la capa del servidor de aplicaciones y, por último, en la capa del servidor de bases de datos.
La respuesta habitual cuando el aumento de la carga de usuarios provoca cuellos de botella es ampliar los servidores web. Esto es relativamente fácil y barato, y a veces funciona. Sin embargo, en la mayoría de los casos de alta carga de usuarios, el escalado de la capa del servidor web sólo traslada el cuello de botella al servidor de aplicaciones. Escalar los servidores de aplicaciones puede ser más complejo y caro que escalar los servidores web, y hacerlo normalmente sólo traslada el cuello de botella al servidor de base de datos, que es aún más difícil y caro de escalar. Aunque puedas escalar la base de datos, al final acabas teniendo una topología en forma de triángulo, en la que la parte más ancha del triángulo son los servidores web (más ...
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