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From: Dan Cross <crossd@gmail.com>
Date: Thu, 30 Aug 2012 19:55:39 +0530
Message-ID: <CAEoi9W4i2tW2fS=P-pMWu+hiwchnqtrW-GoPv-QvcLq+Hqyabw@mail.gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] rc's shortcomings (new subject line)
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On Thu, Aug 30, 2012 at 7:51 PM, Dan Cross <crossd@gmail.com> wrote:
> A parallel apply sort of thing could be used with xargs, of course;
> 'whatever | xargs papply foo' could keep some $n$ of foo's running at
> the same time.  The magic behind 'papply foo `{whatever}' is that it
> knows how to interpret its arguments in blocks.  xargs will invoke a
> command after reading $n$ arguments, but that's mainly to keep from
> overflowing the argument buffer, and (to my knowledge) it won't try to
> keep multiple instances running them in parallel.

Oops, I should have checked the man page before I wrote.  It seems
that at least some version of xargs have a '-P' for 'parallel' mode.