April 2020
Beginner to intermediate
540 pages
14h 14m
Russian
Content preview from MongoDB: полное руководство
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304 Глава 11. Компоненты набора реплик
перегруженных серверов, которые реагируют слишком медленно. В этих
случаях выборы могут занять больше времени – даже до нескольких минут.
Откаты
Процесс выборов, описанный в предыдущем разделе, означает, что если
первичный узел выполняет операцию записи и становится недоступен,
прежде чем вторичные узлы успевают его реплицировать, следующий из-
бранный первичный узел может не иметь права записи. Например, пред-
положим, у нас есть два центра обработки данных, один с первичным и
вторичным узлами, а другой с тремя вторичными узлами, как показано
на рис. 11.2.
Рис. 11.2. Возможная конфигурация с двумя ...
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