Question

我目前正在尝试使用GNU Parallel，但我并没有成功。安装非常简单。我的目标是运行python脚本youtube-dl的两个并行实例及其相应的参数。使用parallel并执行脚本的正确方法是什么？

并行

parallel 'youtube-dl -w --no-warnings -o "/media/video1.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/stun-gun-used-on-man-in-police-custody-dies-lawsuit-dnt-brown-tsr.cnn"' 'youtube-dl -w --no-warnings -o "/media/video2.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/5-year-old-saves-family-from-house-fire.ktla"'

如果在没有并行的情况下单独运行命令，它可以工作：

youtube-dl -w --no-warnings -o "/media/video1.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/stun-gun-used-on-man-in-police-custody-dies-lawsuit-dnt-brown-tsr.cnn"

youtube-dl -w --no-warnings -o "/media/video2.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/5-year-old-saves-family-from-house-fire.ktla"

Answer 1

对于两个流，只需在第一个命令的末尾放一个＆符号（＆amp;）就可以了。像这样：

youtube-dl -w --no-warnings -o "/media/video1.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/stun-gun-used-on-man-in-police-custody-dies-lawsuit-dnt-brown-tsr.cnn" &
youtube-dl -w --no-warnings -o "/media/video2.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/5-year-old-saves-family-from-house-fire.ktla" &

# Wait for both downloads to finish
wait

如果你想使用GNU Parallel ...就像这样 - 虽然我通常会被告知更好的方式....： - ）

创建一个名为work.txt的文件，其中包含以下内容：

/media/video1.%(ext)s http://www.cnn.com/videos/us/2015/11/11/stun-gun-used-on-man-in-police-custody-dies-lawsuit-dnt-brown-tsr.cnn
/media/video2.%(ext)s http://www.cnn.com/videos/us/2015/11/11/5-year-old-saves-family-from-house-fire.ktla

然后命令是：

parallel --colsep " " youtube-dl -w --no-warnings -o {1} {2} < work.txt

另一种选择是简单地将两个命令放在一个文件中，并将其发送到GNU Parallel的标准输入，如下所示：

将其存储在work.txt

中

youtube-dl -w --no-warnings -o "/media/video1.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/stun-gun-used-on-man-in-police-custody-dies-lawsuit-dnt-brown-tsr.cnn"
youtube-dl -w --no-warnings -o "/media/video2.%(ext)s" "http://www.cnn.com/videos/us/2015/11/11/5-year-old-saves-family-from-house-fire.ktla"

然后运行

parallel < work.txt

Exception多个脚本实例 - GNU Parallel

1 个答案: