我有两个程序,它们有不同的建议,它们的名称如下:
./FolderCounter <PATH TO FOLDER> traceX
./VideoCounter <PATH TO VIDEO> traceY
运行这些应用程序,我有以下命令与GNU并行:
parallel ./FolderCounter {} trace3 ::: $(cat PatinN_files.txt) &> data_output/Result_PatinN_files.txt
parallel ./FolderCounter {} trace5 ::: $(cat PatinS_files.txt) &> data_output/Result_PatinS_files.txt
parallel ./VideoCounter {} trace3 ::: $(cat PatinN_videos.txt) &> data_output/Result_PatinN_video.txt
parallel ./VideoCounter {} trace5 ::: $(cat PatinS_videos.txt) &> data_output/Result_PatinS_video.txt
我的目标是将这四行合并成一个GNU并行命令,以便它可以更好地管理并行作业的数量,并在有处理器可用时立即启动下一批文件。
我该怎么做呢?
第一:不要这样做:
parallel ... ::: $(cat foo)
:
parallel ... :::: foo
在大多数情况下,这将做你想要的,而第一个可能会导致问题,如果它包含有空格的行。
我假设PatinN_files.txt具有与PatinN_videos.txt相同的行数。
通常我会执行两次运行:trace3-run和trace5 run:
parallel ./FolderCounter {1} trace3 ";" ./VideoCounter {2} trace3 ::::+ PatinN_files.txt PatinN_videos.txt &> data_output/Result_PatinN.txt
parallel ./FolderCounter {1} trace5 ";" ./VideoCounter {2} trace5 ::::+ PatinS_files.txt PatinS_videos.txt &> data_output/Result_PatinS.txt
或者您可以简单地使用GNU Parallel首先生成所有要运行的命令,然后运行它们(这不要求文本文件具有相同的行数):
(
parallel --dry-run ./FolderCounter {} trace3 :::: PatinN_files.txt
parallel --dry-run ./FolderCounter {} trace5 :::: PatinS_files.txt
parallel --dry-run ./VideoCounter {} trace3 :::: PatinN_videos.txt
parallel --dry-run ./VideoCounter {} trace5 :::: PatinS_videos.txt
) | parallel &> data_output/Result.txt
要跟踪哪个输入生成什么输出,使用:
) | parallel --tag &> data_output/Result.txt
将日志输出放到4个不同的文件中有点困难。如果确实需要的话,也可以这样做,但不如上面那样优雅。
如果您只是想在有空闲cpu时运行作业,您可以使用--load 100%
:
parallel --load 100% ./FolderCounter {} trace3 ::: $(cat PatinN_files.txt) &> data_output/Result_PatinN_files.txt &
parallel --load 100% ./FolderCounter {} trace5 ::: $(cat PatinS_files.txt) &> data_output/Result_PatinS_files.txt &
parallel --load 100% ./VideoCounter {} trace3 ::: $(cat PatinN_videos.txt) &> data_output/Result_PatinN_video.txt &
parallel --load 100% ./VideoCounter {} trace5 ::: $(cat PatinS_videos.txt) &> data_output/Result_PatinS_video.txt &
wait
如果即时负载小于cpu数量,则会启动作业。