Subject: Re: [ast-users] suggestion: parallel sh
--------
> Hi,
>
> http://minilien.org/t48k
>
> the principle is interresting :
>
> set -j 4
>
> however, I prefer to just limit the // executions using the usual &
>
> for i in 3 5 11 21 8 9 13 7; do
> echo sleep $i
> ( sleep $i
> echo $i finished ) &
> done
>
> than any new keywords like :
>
> pfor i in 3 5 11 21 8 9 13 7; do
> echo sleep $i
> sleep $i
> echo $i finished
> done
>
> I suppose that the expected result is :
> sleep 3
> sleep 5
> sleep 11
> sleep 21
> 3 finished
> sleep 8
> 5 finished
> sleep 9
> 11 finished
> sleep 13
> 8 finished
> sleep 7
> 9 finished
> 7 finished
> 21 finished
> 13 finished
>
> possible usage :
>
> set -j #
>
> where # is the maximum number of // jobs
> 0 : infinite (default)
> -1 : auto-configure to the number of cpu
>
ksh93 uses the variable JOBMAX to control the maximum number
of background processes. If more than JOBMAX is invoked,
then ksh93t waits for one to complete.
ksh93u will be introducing named background pools and jobs
in background pools can execute on other systems.
The syntax
& poolname
defines and sets the current background pool. Each background
job will be placed in this pool until another
& pool
is given.
You can invoked kill,wait and other job related commands on a pool.
There will be more about this as ksh93u progresses.
David Korn
[email protected]
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