Поисковая система Гугл

Поисковая система Гугл
Поисковая систем Google - лидер среди поисковиков во всем мире. В России по количеству пользователей Гугл занимает второе место, уступая лишь российской поисковой системе "Яндекс".

Интернет наполнен огромным количеством сайтов. Одни из них хорошие и информативные, а другие, мягко говоря, не очень. Чтобы найти необходимую нам информацию мы пользуемся поисковыми системами. Но как отличить поисковым системам хорошие сайты от плохих?
Для этого были придуманы поисковые алгоритмы. Сначала "робот" находит сайты и сохраняет текстовую информацию с них в файле. Файл называется обратный индекс. В нем все слова сохраняются в порядке частоты их использования. При запросе в поисковой системе Google, алгоритм изначально ищет совпадения в файлах обратного индекса.
Но таких файлов находиться миллионы. Что-то надо поставить на первое место, а что-то и на последнее. Поэтому кроме файлов обратного индекса поисковая система использует еще более 100 показателей.
Эти показатели не раскрываются, так как это может повлечь искусственное выдвижение сайтов на первые позиции. Несмотря на это, основные критерии ранжирования известны специалистам по продвижению сайтов.
Большое количество файлов обратного индекса необходимо где-то хранить. Именно поэтому Гугл сам производит серверы для своей поисковой системы. Более того, Google является мировым лидером в производстве серверов, несмотря на то, что на продажу они их не делают.

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