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                > 通過本課可以對存儲有一個本質了解。 > 本課學習時長評估:3小時。 ## 存儲大道至簡 [存儲層精華講解:mysql/redis/hdfs/hbase/kafka存儲選型](https://www.bilibili.com/video/BV18E411A7t4) ***** 通過這個2小時視頻,我們實際是理解了存儲的"道": * [ ] 速度:磁盤尋址:毫秒級別;磁盤IO(順序讀寫:百M級別;隨機讀寫:K級別);內存尋址:納秒級別;內存是磁盤速度的10萬背數。 * [ ] 提速:索引、KV都是提速的手段。 * [ ] 分治:分庫分表,水平切割,垂直切割,都是分治的思想。 * [ ] 核心:利用當前硬件的極限,解決某類場景的問題。
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