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From: "Stephen McConnell" <mcconnell@dpml.net>
To: "'Ant Users List'" <user@ant.apache.org>
Subject: RE: Copy-Task
Date: Thu, 2 Feb 2006 04:15:15 +1030
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> -----Original Message-----
> From: Steve Loughran [mailto:stevel@apache.org] 
> Sent: Thursday, 2 February 2006 2:25 AM
> To: Ant Users List
> Subject: Re: Copy-Task
> 
> Stephen McConnell wrote:
> >  
> > 
> >> -----Original Message-----
> >> From: Steve Loughran [mailto:stevel@apache.org]
> > 
> >> -you can use the <different> selector to do byte for byte 
> comparisons 
> >> of files. But that pulls all the remote data down and can clog a 
> >> network
> > 
> > Would an MD5 comparison be sufficient?
> 
> you probably don't even need a hash that strong. But you do 
> need to cache the hash somewhere, because if you have to 
> calculate it on demand, then you have just done the data copy 
> that you wanted to avoid...

I'm assuming that there is a MD5 on the server (or at least an MD5 could be
placed on the server with the artifact) and that you would download the MD5
and compare that with a locally generated MD5 (avoiding any artifact
download).

/Steve.



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