Databases / Bloomfilter

從數十億垃圾郵件列表中，判斷某邮箱是否為垃圾邮箱

在很多場景上，常需要判斷 A 是否在此集合裡面。

「某 A 郵箱，判斷是否在數十億垃圾郵箱列表中，來達到防止垃圾郵箱的訪問、註冊等等。」

如果我們在查找數據庫之前有做數據緩存，像是 redis 緩存之類的，假設黑客惡意大量訪問、發起大量請求。

不僅會造成緩存掛掉，還有數據庫掛掉

那就是知名的穿庫、緩存穿透問題。

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PostgreSQL apache2 api array async auto aws beautify-ruby benchmark bloomfilter bot branch bucket bug build build_stubbed centos chrome class collection command commit compass cookie count css databases db domain enum error es5 es6 eth exists extend factorybot factorygirl feeling figaro fixed font-size git godaddy hangzhou heroku hexo index install instance ios javascript jquery json lazy-loading learn lendbot lending length linode linux load-more logdown mariadb material-design meetup member migration modal mysql mysql@5.7 notify package-install pakogi performance poloniex pq preventDefault problm psql rails rake redis remote resource rollback routes rspec rss ruby ruby-on-rails s3 sass sass-convert screen scroll scss seo session setting share shell-script size spec speed stash stopPropagation string sublime symbol telegram test ubuntu url utf utf8mb4 version visual-studio wallet wget wordpress wpf xml youtube

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