Re: Problems with GNU Parallel and ulimit

[myglc2 <myglc2@gmail.com>]

On 08/15/2017 at 00:14 Arun Isaac writes:

> Leo Famulari writes:
>
>> On Mon, Aug 14, 2017 at 12:46:25PM +1000, Ben Woodcroft wrote:
>>> On 14/08/17 12:31, Arun Isaac wrote:
>>> > Does `parallel' work for anybody? When I run
>>> > 
>>> > $ ls | parallel echo
>>> > 
>>> > I get the following error message, and nothing happens.
>>> It works fine for me using Guix on a foreign OS, and has since I can
>>> remember.
>>> ben
>>
>> Same here. Arun, can you give some more details about your system?
>
> This is probably a problem only on GuixSD systems. Could you try on
> GuixSD instead of using Guix on a foreign distro?

I think you are correct. I run GuixSD and, after installing parallel I
get ...

***
g1@g1 ~$ ls | parallel echo
Academic tradition requires you to cite works you base your article on.
If you use programs that use GNU Parallel to process data for an article in a
scientific publication, please cite:

  O. Tange (2011): GNU Parallel - The Command-Line Power Tool,
  ;login: The USENIX Magazine, February 2011:42-47.

This helps funding further development; AND IT WON'T COST YOU A CENT.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.

To silence this citation notice: run 'parallel --citation'.

parallel: Warning: No more processes: Decreasing number of running jobs to 7.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 6.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 5.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 4.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 3.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 2.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Warning: No more processes: Decreasing number of running jobs to 1.
parallel: Warning: Raising ulimit -u or /etc/security/limits.conf may help.
parallel: Error: No more processes: cannot run a single job. Something is wrong at bin.
g1@g1 ~$ guix --version
guix (GNU Guix) 0.13.0.1765-9ef59
Copyright (C) 2017 the Guix authors
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
g1@g1 ~$ 
***

I am not a parallel user so I can't comment further.

HTH - George