MelodyYN 2022-02-13 08:26:28 阅读数:656
because Mysql Limitation of database storage capacity , So developed Hive Data can be stored in HDFS To solve this problem .
Hive： from Facebook Open source is used to solve massive problems Structured log Data statistics tools .
Hive Is based on Hadoop One of the Data warehouse tools , Can be Structured data files are mapped into a table , And provide classes SQL Query function
The essence ： take HQL Turn it into MapReduce Program
Hive The processed data is stored in HDFS
Hive The implementation of the underlying analysis data is MapReduce
The execution program runs in Yarn On
shortcoming （ from HDFS Inherited from the shortcomings of ）
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