当我们用编程语言编写一个 forloop时,我们正在构建一个迭代的命令式:我们要求计算机首先完成一个工作,然后循环到最后。但通过GNU Parallel编写命令时,我们遵循所谓的描述性功能编程。就是,我们尝试用模式描述我们想要的内容,然后让计算机填写该模式并输入完整命令。 GNU Parallel的极简介绍 GNU Parallel 是一个非常好用...
bash multithreading for-loop curl parallel-processing 1个回答 0投票 我建议不要循环: curl --retry 20 'http://example.com/Services/ServiceWS?[0000001-0000100]' \ -H 'Accept: */*' \ -H 'Accept-Language: en-US,en;q=0.9' \ -H 'Content-Type: text/xml; charset=UTF-8' \ --data...
EN我有一个提交给集群的Bash脚本，该集群调用Python脚本的管道，这些Python脚本是为并行处理而构建的多线...
Shell - multiprocessing for bash loop, Example: To generate the numbers from 1 to 4'000'000 I compared the following approaches on a quad core. One bash loop (16.1s); four bash loops in parallel (5.2s); one awk loop (0.9s); and seq (0.1s). Note that the loops here used only b...
loop once loop once 在这个for语句中,我们把变量upperBound的值作为循环上限。其实我们完全可以去掉upperBound前面的$符号,直接写为for ((i=1; i < upperBound; i++)),结果没有任何区别。那这样子的话,假如某个变量根本就不存在呢? for((i=0; i < nonExist; i++))doecho"loop once"done ...
Thefindcommand is another way to implement the functionality of aforloop, as it offers several ways to define the scope of which files to include in your loop as well as options forParallelprocessing. Thefindcommand is meant to help you find files on your hard drives. Its syntax is simple:...
CMS垃圾收集器收集详细步骤 初始标记(Stop the world) 并发标记 预清理 可被终止的预清理 重新标记(Stop the world) 并发清除 并发重置 初始标记 标记GcRoots直接可达老年对象,新生代存活对象引用的老年代对象.整个过程在JDK1.7中是单线程的在JDK1.8中是多线程的(通过CMSParallelInitialMarkEnabled参数调整)。这个过程...
foriin`seq09`;do doCalculations$i& done wait 上面的脚本将等待所有生成的10个子进程,但它始终给出退出状态0(参见help wait)。如何修改此脚本,以便它在任何子进程以代码结束时发现生成的子进程的退出状态并返回退出代码1!= 0? 有没有比收集子流程的PID、按顺序等待它们并求和退出状态更好的解决方案?
A shell allows execution ofGNUcommands, both synchronously and asynchronously. The shell waits for synchronous commands to complete before accepting more input; asynchronous commands continue to execute in parallel with the shell while it reads and executes additional commands. Theredirectionconstructs permi...
-a <password> Password for Redis Auth -c <clients> Number of parallel connections (default 50) -n <requests> Total number of requests (default 100000) -d <size> Data size of SET/GET value in bytes (default 2) -dbnum <db> SELECT the specified db number (default 0) ...