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Re: Some question about excute parallel

From: Ole Tange
Subject: Re: Some question about excute parallel
Date: Fri, 17 Jan 2020 03:57:43 +0100

On Thu, Jan 16, 2020 at 10:08 AM 王懿杰 <address@hidden> wrote:
>     recently ,i use parallel to excute many jobs at same time. But there is 
> something bothering me.
>     i got a command-list file which contain about 35000 commands, and it 
> should output 35000 results as i designed.
>     Then i just type the command : parallel --jobs 100 < command-list
>     after some time, i found i got more than 35000 results in my directory.
>     Is my command wrong?

Please follow this. It makes it possible to help you:

       Report bugs to <address@hidden> or

       See a perfect bug report on

       Your bug report should always include:

       · The error message you get (if any). If the error message is
         not from GNU parallel you need to show why you think GNU
         parallel caused these.

       · The complete output of parallel --version. If you are not
         running the latest released version (see
         http://ftp.gnu.org/gnu/parallel/) you should specify why
         you believe the problem is not fixed in that version.

       · A minimal, complete, and verifiable example (See
         description on http://stackoverflow.com/help/mcve).

         It should be a complete example that others can run that
         shows the problem including all files needed to run the
         example. This should preferably be small and simple, so try
         to remove as many options as possible. A combination of
         yes, seq, cat, echo, and sleep can reproduce most errors.
         If your example requires large files, see if you can make
         them by something like seq 1000000 > file or yes | head -n
         10000000 > file.

         If your example requires remote execution, see if you can
         use localhost - maybe using another login.

         If you have access to a different system, test if the MCVE
         shows the problem on that system.

       · The output of your example. If your problem is not easily
         reproduced by others, the output might help them figure out
         the problem.

       · Whether you have watched the intro videos
         walked through the tutorial (man parallel_tutorial), and
         read the EXAMPLE section in the man page (man parallel -
         search for EXAMPLE:).

       If you suspect the error is dependent on your environment or
       distribution, please see if you can reproduce the error on
       one of these VirtualBox images:

       Specifying the name of your distribution is not enough as you
       may have installed software that is not in the VirtualBox

       If you cannot reproduce the error on any of the VirtualBox
       images above, see if you can build a VirtualBox image on
       which you can reproduce the error. If not you should assume
       the debugging will be done through you. That will put more
       burden on you and it is extra important you give any
       information that help. In general the problem will be fixed
       faster and with less work for you if you can reproduce the
       error on a VirtualBox.


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