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Date: Tue, 26 Feb 2008 15:04:48 -0600
From: Vijay Aravamudhan <avijayr@gmail.com>
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To: Ant Developers List <dev@ant.apache.org>
Subject: Re: Tasks in parallel
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Yes - I do agree totally with you that it needs to be done intelligently.

What I am trying to inquire about is the existence of the ability which 
itself is not present right now. For eg, in my scenario, I know that I 
am trying to copy to an ftp server using the scp command, and that there 
is network bandwidth to support multiple connections.

thanks for your reply,
Vijay

Jeffrey E Care wrote:
> One thread per file? Hows that going to help for a fileset that selects 50 
> files? 100? 1000?
>
> Don't get me wrong - to build WebSphere we have many custom tasks that 
> spawn worker threads. My point is that you have to be smart about how you 
> build in multthreading support; simply spawning a thread for every unit of 
> work isn't very smart & for cases where you have many many units of work 
> you're more likely to make things worse than better.
>
> ____________________________________________________________________________________________ 
>
> Jeffrey E. (Jeff) Care 
> carej@us.ibm.com 
> IBM WebSphere Application Server 
> WAS Release Engineering 
>
>
>
>
>
>
>
> Vijay Aravamudhan <avijayr@gmail.com> 
> 02/26/2008 02:36 PM
> Please respond to
> "Ant Developers List" <dev@ant.apache.org>
>
>
> To
> Ant Developers List <dev@ant.apache.org>
> cc
>
> Subject
> Tasks in parallel
>
>
>
>
>
>
> hi,
> I know that there is already a parallel task. But...
>
> We have a build file which goes something like this:
>
> <fileset refid="foo">
>     <include..../>
> </fileset>
> ...
> <copy todir="blah">
>     <fileset id="foo"/>
> </copy>
>
> (I have omitted the unnecessary bits for this example)
>
> Consider the scenario where the file transfer takes a long time: would 
> it be a good idea to have the copy/scp/ftp tasks create different 
> threads for each file? I know I can separate the fileset into individual 
> files and then create multiple copy commands that are wrapped inside a 
> parallel task. But that defeats the purpose of defining the fileset in 
> the first place. What do you think?
>
> thanks,
> Vijay
>
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