September 2024
Intermediate to advanced
346 pages
9h 51m
Spanish
Content preview from Desarrollo Web con Node y Express, 2ª Edición
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Capítulo 13. Persistencia
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Todos los sitios y aplicaciones web, salvo los más sencillos, van a necesitar algún tipo depersistencia; es decir, alguna forma de almacenar datos que sea más permanente que la memoria volátil, de modo que tus datos sobrevivan a caídas del servidor, cortes de energía, actualizaciones y traslados. En este capítulo, hablaremos de las opciones disponibles para la persistencia y haremos demostraciones tanto de bases de datos de documentos como de bases de datos relacionales. Sin embargo, antes de pasar a las bases de datos, empezaremos con la forma más básica de persistencia: la persistencia del sistema de archivos.
Persistencia del sistema de archivos
Una forma de conseguir la persistencia de es simplemente guardar los datos en los llamados archivos planos(planos porque no hay una estructura inherente en un archivo; es sólo una secuencia de bytes). Node hace posible la persistencia del sistema de archivos a través del módulo fs (sistema de archivos).
La persistencia del sistema de archivos tiene algunos inconvenientes. En particular, no se escala bien. En cuanto necesites más de un servidor para satisfacer las demandas de tráfico, tendrás problemas con la persistencia del sistema de archivos, a menos que todos tus servidores tengan acceso a un sistema de archivos compartido. Además, como los archivos planos no tienen una estructura inherente, ...
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