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2019-06-26

并发并行

tomcat哪怕在多核cpu中运行,也还是多线程并发,不算并行
tomcat内部使用多线程,但是操作系统会把这些现场分布到多个cpu core里面
所谓的并行,是指一个task分解多多个task,比如java 7的fork/join, 又或者spark的分布式计算,是一定需要多core的cpu或者多个cpu来计算

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