gnu parallel：同步輸出？

Question

我運行一個GNU並行作業是這樣的：

parallel program ::: 1 2 3 4 5 6 7 8 9 10 > output.txt 

我要保證輸出文件是有序的。也就是說，第一行對應於program 1的輸出，輸出的下一行program 2等。

如何保證這一點？

Answer 1

我認爲-k的選擇可能是你想要什麼：

--keep-order 
    -k  Keep sequence of output same as the order of input. 
      Normally the output of a job will be printed as soon 
      as the job completes. 
      Try this to see the difference: 
       parallel -j4 sleep {}\; echo {} ::: 2 1 4 3 
       parallel -j4 -k sleep {}\; echo {} ::: 2 1 4 3 

在從該名男子頁前者例如，輸出1 2 3 4，而後者確實產生2 1 4 3。