安安 运维,信息世界的守夜人

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    安安 November 9th, 2020 at 06:20 am

    这辈子不甘心这样

    安安 October 14th, 2020 at 11:29 am

    错过的人,就永远错过了

    安安 September 30th, 2020 at 02:01 am

    心微微痛了那么一下

    安安 August 9th, 2020 at 02:30 pm

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    安安 May 14th, 2020 at 10:17 am

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    安安 May 11th, 2020 at 03:03 pm

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    女神,不属于我了

    安安 April 22nd, 2020 at 03:38 pm

    安安 April 14th, 2020 at 03:59 am

    安安 April 14th, 2020 at 01:28 am

    安安 April 8th, 2020 at 05:49 am

    Elastic 官方文档建议:一个 Node 最好不要多于三个 shards。

    安安 April 7th, 2020 at 01:46 pm

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    安安 April 6th, 2020 at 04:54 am

    opnsense、panabit、zeroshell与pfsense等软路由系统

    安安 April 5th, 2020 at 10:53 am

    1、打印文件的第一列(域)                 : awk '{print $1}' filename 2、打印文件的前两列(域)                 : awk '{print $1,$2}' filename 3、打印完第一列,然后打印第二列  : awk '{print $1 $2}' filename 4、打印文本文件的总行数                : awk 'END{print NR}' filename 5、打印文本第一行                          :awk 'NR==1{print}' filename 6、打印文本第二行第一列                :sed -n "2, 1p" filename | awk 'print $

    安安 April 5th, 2020 at 01:50 am

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    安安 March 28th, 2020 at 03:10 pm

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    安安 March 26th, 2020 at 11:28 am

    所以,并发是在一段时间内宏观上多个程序同时运行,并行是在某一时刻,真正有多个程序在运行。 并行和并发的区别: 并发,指的是多个事情,在同一时间段内同时发生了。   并行,指的是多个事情,在同一时间点上同时发生了。 并发的多个任务之间是互相抢占资源的。   并行的多个任务之间是不互相抢占资源的、 只有在多CPU或者一个CPU多核的情况中,才会发生并行。否则,看似同时发生的事情,其实都是并发执行的。

    安安 March 26th, 2020 at 11:28 am

    并行(Parallel),当系统有一个以上CPU时,当一个CPU执行一个进程时,另一个CPU可以执行另一个进程,两个进程互不抢占CPU资源,可以同时进行,这种方式我们称之为并行(Parallel)。

    安安 March 26th, 2020 at 11:28 am

    并发(Concurrent),在操作系统中,是指一个时间段中有几个程序都处于已启动运行到运行完毕之间,且这几个程序都是在同一个处理机上运行。

    安安 March 26th, 2020 at 07:57 am

    cache和buffer

    cache 读加速

    buffer 缓冲写

    安安 March 25th, 2020 at 04:54 am

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    安安 March 24th, 2020 at 03:55 am

    acme.sh 是个好东西

    安安 March 23rd, 2020 at 03:50 pm

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    安安 March 23rd, 2020 at 10:03 am

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    安安 March 23rd, 2020 at 06:31 am

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    被小人坑了一把,几万块钱

    安安 March 22nd, 2020 at 04:43 pm

    安安 March 22nd, 2020 at 01:24 pm

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    安安 March 21st, 2020 at 04:55 pm

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    安安 March 21st, 2020 at 02:35 am

    安安 March 20th, 2020 at 03:40 pm

    安安 March 20th, 2020 at 03:38 pm

    自从来到这家公司,对阿里出来的人印象大打折扣

    安安 March 20th, 2020 at 03:37 pm

    远离小人

    安安 March 20th, 2020 at 03:37 pm

    远离小人

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关于我

  • 长夜将至,我从今开始守望,至死方休。我将尽忠职守,生死于斯。我是黑暗中的利剑,长城上的守卫,抵御寒冷的烈焰,破晓时分的光线,唤醒眠者的号角。我将生命与荣耀献给守夜人,今夜如此,夜夜皆然。

那年今日
8 月前

所以,并发是在一段时间内宏观上多个程序同时运行,并行是在某一时刻,真正有多个程序在运行。 并行和并发的区别: 并发,指的是多个事情,在同一时间段内同时发生了。   并行,指的是多个事情,在同一时间点上同时发生了。 并发的多个任务之间是互相抢占资源的。   并行的多个任务之间是不互相抢占资源的、 只有在多CPU或者一个CPU多核的情况中,才会发生并行。否则,看似同时发生的事情,其实都是并发执行的。